Develop Bugs

Dead P3300 due to battery?

Hi all,
My two year old HTC P3300 has gone dead and I suspect it could be the battery. How could I know for sure? When it was new I upgraded to WM6 and apllied the corrupt SD patch because it was crashing sometimes when I would access the SD.
After that it has been working flawlessly for over a year except for battery life which has been getting shorter and shorter for the past few months. I turned off bluetooth and wifi and still the P3300 was only able to go for about 24H with normal usage (just four or five calls, a few reminders and no GPS).
All of a sudden a couple of weeks ago it started just turning off by itself when using simple things like card games. I could feel the battery was pretty warm and pressing the power button would do nothing. Only a soft reset would work.
Then a few days ago it finally decided to die. I was playing Freecell with the battery at about 80% and it turned off by itself but now even soft reset won't work. When I plug in the charger the orange light wont turn on althoug the battery does get a little warm.
The only thing it will let me do is start a hard reset but nothing much happens. It says to press send if I want to return the P3300 to the original factory settings. I accept and for about one seccond it shows:
Format FAT partition!
Format complete!
Then I get the HTC boot screen and some red letters that say:
IPL 1.36.0001
SPL 1.36.0000
and then nothing else happens. It just stays like that for a couple of minutes until it turns off by itself. After that I can't even do a hard reset unless I put the phone on the charger for a couple of hours.
To me this looks like it could be an exhausted battery but how can I confirm this without buying a new battery? I checked with a tester and I get 3.07V DC but I can't seem to get any amp reading (maybe I'm doing it wrong).
Please any ideas would be welcome. I love my P3300 and I hate the idea of having to change.

lolailo54 said:
Hi all,
My two year old HTC P3300 has gone dead and I suspect it could be the battery. How could I know for sure? When it was new I upgraded to WM6 and apllied the corrupt SD patch because it was crashing sometimes when I would access the SD.
After that it has been working flawlessly for over a year except for battery life which has been getting shorter and shorter for the past few months. I turned off bluetooth and wifi and still the P3300 was only able to go for about 24H with normal usage (just four or five calls, a few reminders and no GPS).
All of a sudden a couple of weeks ago it started just turning off by itself when using simple things like card games. I could feel the battery was pretty warm and pressing the power button would do nothing. Only a soft reset would work.
Please any ideas would be welcome. I love my P3300 and I hate the idea of having to change.
Click to expand...
Click to collapse
Hi!
I'm experiencing the same problems...
Tried new rom, sdhc update cab, format sd to fat32, try another sd, etc...
Seems that the phone works more or less well if there's no sd card (maybe because it need more juice from the battery?), and even better, if I can say that for a phone..., without sim card too.
It worked more or less today only with sim card on it, but when there was an sd card it keeps blocking, hanging and turning off with difficult turn on situation.
Can someone help us?
Thanks!

Hello both.
It can be frustrating waiting for help (and you might have found an alternative solution) but I'll say what I can.
If your Artemis can be operated more normally whilst charging but fails quickly under battery power, that certainly suggests a battery problem.
Batteries are consumables but hard to test (although some shops can) - try your local retailer?
My spare battery is a Sanyo ARTE160 rated 3.7V 1,200mAh.
On the reverse, 4.2VDC is printed amongst chinese characters and it actually measures 4.16V off load. I'd think 3V far too low.
There's clever technology behind the management of these LiOn batteries because both over charge and over discharge can damage them. Their life is more determined by battery chemistry and charge/discharge cycles than age.
One caution - measure voltage by all means...
BUT
DO NOT measure current with a test meter to a battery - particularly not a LiOn battery - because it amounts to a short circuit. Current can be so high as to blow the meter fuse and in cases of sustained short circuit or over charging, the battery can swell or even burst dangerously.
I'd think a replacement battery (via e-bay?) far less expensive than paying repairers to confirm the battery was the only problem.
Hope this helps

Hi!
I bought a replacement battery from Ebay.
All seems to be OK yesterday at night until today by noon.
Today, in the middle of a phone call, the phone stalls.
After a reboot and some hours later, the phone keeps crashing and crashing and, sometimes, it doesn´t turn on...
Will try now to upload an original rom and see what it does.
Regards!

This might have happened because difficulties whilst using an impaired battery left a legacy of part-saved data, registry and file corruption problems.
The outcome would be good to know because battery problems can/will affect us all eventually.
Also, a brand new battery can need a few charge/discharge cycles to bring it up to best condition.

I also got a new batery from ebay and unfortunately it still doesn't work. Behaviour is exactly the same as before.
I suppose this means it is hardware related. Do you suggest opening it up to see if there is anything loose or broken that could be resoldered?
Thanks,

My p3300 went blank and I had the take the battery out to switch it on again. Took it to HTC and they had to replace the insides of the phone. When I got is back the batt. Only lasted for a day and it use to work for 4 days.

Empty DHD not charging, not powering on, no led.

Hello people
A couple of hours ago, my phone shut down due to empty battery. I came home, plugged it in and booted it, all was fine. At about 60% I shut it off and went to have lunch, when I came back and tried to turn it on, I couldn't.
Led was orange at the time, I unplugged the power cord but the led stayed on! I removed the battery to be able to reboot it, but when I re-inserted it I still wouldn't boot.
Now no matter how I try to charge it, led stays off like it's not charging. Tried various different cables/chargers, the same. Tried to plug it to the charger without battery but no led flashed. Tried to boot without sim/sd card, still the same.
Any ideas?
My battery has never been changed (for a year now) and has had a bunch of full drains. Could this be a dead battery? :/

Well seems the phone is fried... I tried two more official batteries and no go...

Sorry to hear it. I thought that at first when I read your thread but I thought because I am not the most experienced person here, there might be some kind of fix.
HTC will most likely if not certainly replace this handset for you, seeing as it just happened out of the blue.

Well I certainly hope so, problem is I suspect it's an import (from another European country) and local HTC service generally does not do well with European imports.
Anyway I'll give it a try, meanwhile I'm getting a sensation soon

I have a similar problem.
I'm lucky that my girlfriend has the same handset as I do, the I could compare the phone abnormal behavior tho that of her properly working phone.
The first thing I've noticed, after a while when the charger was attached, was that the phone is very hot and that the battery keeps draining out in a surprisingly high rate.
After a while I've noticed that even when the phone is turned off it wont recharge. Sometimes the Orange LED is on when recharging while it is off, and the LED stays on for a few seconds after removing the charger, as if it was still charging. Note that the affects of connecting the charger to the phone, are mainly the ones listed below (not necessarily altogether)
* The phone indicates as if it recharges.
* Going to an infinite loop of rebooting and crashing.
* Getting hot when power supply is plugged, or at any time when the phone is turned on.
Ultimately the battery was empty, and the only way I had to keep using the phone (mostly to diagnose the symptoms listed here) was to swap the battery with the one of my girlfriend's device, and charge my battery in her device while using her's. That's the place to mention that the battery works just fine and that the phone is draining any battery, no matter what.
I took it apart to have a closer look at the source of all of the heat emitted while the phone is turned on, and it seem to come from the motherboard itself.
That's all I have.
The worst thing is that a friend of mine who helped me opening it up broke the pcb of the volume keys. Now I checked and It turns out that that pcb is actually part of the flex cable, which sort of extension of the motherboard and is mainly the second most important piece of hardware of all the phone parts (not that there are so many). If I would be able to expose the conductors inside the flat cable I might be able to solder an alternative volume pad I'll make out of old some miniature switches I have. The cable is very thin. any Ideas of how to expose the relevant conductors without ripping the cable apart?

Just a (late) update:
It's been almost two years, I had given the phone to a close friend of mine after a couple of weeks since writing the first post, just in case he could resurrect it, nothing.
Then, a couple of months down the road, the phone suddenly woke up! He tried to connect it with the charger, after months of not being able to charge or boot it up and somehow it worked. And it has been working flawlessly ever since.
I just got it back to give to my girlfriend until her sensation is fixed, flashing Viper now
In case something like this happens to any of you, don't give up!

Xperia play overheating

i rehoused me xperia play and when i tryed to turn it on i just got the blinking red light, so i bought a new battery that worked for 45 mins when it overheated to 47degress then died so i bought a external battery charger and the battery charges but when i put it in it overheats and dies in an hour and when it charges it gets even hotter and dies faster..... does anyone know how to fix this cause i cant afford to buy a new phone anytime soon

Are you using stock firmware or a custom one?

Stock

well the same thing happened to me..
i rehoused my mobile. but when i was closing up the phone, without putting in the back housing, i tried to switch on the phone so i would check if everything was fine or not. But what i did wrong here was that i just inserted the battery in wrong direction. Negative to the positive and vice versa. Nothing happened at that time, and the phone did not turn on. Upon realizing my mistake, i tried to power on my mobile again with the correct battery connections but this time the phone just wont turn on. There was a weird red light that started blinking and the phone just wont turn on.
so i completed the housing process thinking that maybe that was the problem and there was some sort of a sensor or something but that damn thing just wouldnt turn on. even if i put the mobile on charge it wouldnt turn on. so what i did was, i again opened up the back of my phone, deliberately put the battery in wrong position, tried to switch the phone on, and then i put the battery back again in the right direction and as i press the power button, walla, the phone is alive again.
BUT...
its getting HOT. damn HOT. after only being on for about 5 min, the battery got hot to 54C. upon inspection. i found out that the battery is not getting hot, but its the motherboard that is heating up.
i went to the service center, which opened up the board and found an IC that was damaged (caused by my battery mistake).
Found the IC from china. Ordered it, and TODAY it arrived. I will be going back to the service center, for replacement of the IC. If all is OK, i will let you know.
meanwhile, check out the pic of the IC that got damaged on my mobile during the process of rehousing and my stupidity.

hey thanks that helps cause i think i did the same thing with the battery...do u have a link to buy the new Ic?

FOUND a friend in china, and bought the IC from him ..
STATUS :
just now, after connecting the new IC, the phone has started working again. its NOT heating up. Everything is working fine..
EXCEPT
that now my phone shows no signals. In the settings when i search for other networks, i find many other networks also (MEANING THE TRANSMITTER IS WORKING FINE) but the phone just wont connect to my network and wont give me any signals.
I only get "EMERGENCY CALLS ONLY" status.
I am actually getting fed up of this set. Anyways, i hope u get the IC, and your phone works fine. ( I HOPE )

addictivesundew said:
well the same thing happened to me..
i rehoused my mobile. but when i was closing up the phone, without putting in the back housing, i tried to switch on the phone so i would check if everything was fine or not. But what i did wrong here was that i just inserted the battery in wrong direction. Negative to the positive and vice versa. Nothing happened at that time, and the phone did not turn on. Upon realizing my mistake, i tried to power on my mobile again with the correct battery connections but this time the phone just wont turn on. There was a weird red light that started blinking and the phone just wont turn on.
so i completed the housing process thinking that maybe that was the problem and there was some sort of a sensor or something but that damn thing just wouldnt turn on. even if i put the mobile on charge it wouldnt turn on. so what i did was, i again opened up the back of my phone, deliberately put the battery in wrong position, tried to switch the phone on, and then i put the battery back again in the right direction and as i press the power button, walla, the phone is alive again.
BUT...
its getting HOT. damn HOT. after only being on for about 5 min, the battery got hot to 54C. upon inspection. i found out that the battery is not getting hot, but its the motherboard that is heating up.
i went to the service center, which opened up the board and found an IC that was damaged (caused by my battery mistake).
Found the IC from china. Ordered it, and TODAY it arrived. I will be going back to the service center, for replacement of the IC. If all is OK, i will let you know.
meanwhile, check out the pic of the IC that got damaged on my mobile during the process of rehousing and my stupidity.
Click to expand...
Click to collapse
I did the exact same thing and have the same problem, but the difference is when i try the reverse method it still doesnt come on but cud i get a link to where u found the IC

The problem here is the same IC from the picture. Even though I found the replacement IC from China, I still couldn't get my set to start up normally without overheating. If you remove the IC from the board, the phone will start (even without the IC) but you will get no signals
For me, I was unable to get the phone back to its working condition. So I sold the phone as it was.

addictivesundew said:
The problem here is the same IC from the picture. Even though I found the replacement IC from China, I still couldn't get my set to start up normally without overheating. If you remove the IC from the board, the phone will start (even without the IC) but you will get no signals
For me, I was unable to get the phone back to its working condition. So I sold the phone as it was.
Click to expand...
Click to collapse
But mine wont start at all now, any suggestions? I dont really care if it will get signals or not.

U did the same thing as I did i.e. Insert the battery in wrong position???

addictivesundew said:
U did the same thing as I did i.e. Insert the battery in wrong position???
Click to expand...
Click to collapse
Yep I did, but still nothing

When u put it cell to charge, r u getting a "Red Blinking Light" state?

addictivesundew said:
The problem here is the same IC from the picture. Even though I found the replacement IC from China, I still couldn't get my set to start up normally without overheating. If you remove the IC from the board, the phone will start (even without the IC) but you will get no signals
For me, I was unable to get the phone back to its working condition. So I sold the phone as it was.
Click to expand...
Click to collapse
By inserting the battery in reversed position you probably caused some sort of short-circuit. You probably didn't burn only IC, but many different parts. When the part is damaged and short-circuit exist in it it heats up very very quickly as the current on this part (any many other parts that are connected with it) is very big (this also causes very quick battery drainage). So it means you had probably burnt the mainboard even if the phone switches on, so getting new mainboard is the only sollution to get the phone fully working (as I think you aren't proffessional who can diagnose and repair it. Neither do I ).
I hope this helped somehow.
Sent from my beautiful Xperia PLAY using Tapatalk 2

addictivesundew said:
When u put it cell to charge, r u getting a "Red Blinking Light" state?
Click to expand...
Click to collapse
Yep!!

Hello all I too have an xperia r800i play with the same problem or better the battery under the battery becomes very hot in a few minutes, and drain the battery quickly. Moreover, even when you plug in the charger not charging? only shows the loading icon but then not charged and only the LED flashing red?
And you can not start the phone FASTBOOT? because the LED flashes blue and then turns on a second phone in the normal
how can I do to fix?
thanks

Hey,
i have the same problem.
i tried isolating a pin from battery (the midle one) and i got it to work without heating, i thought it was fixed but then i took the battery back out and overheated again maybe theres something wrong with the pins any alternatives?

i did the same thing my phone is in the fridge now i boosted the battery by usb with bare wires got it started up hoping to get to 50% charge then try a reflash see if that works

Galaxy nexus randomly shuts off..

So...my girlfriend's galaxy nexus started randomly shutting off in the past few weeks..it was completely stock..so i decided to root it, change the kernel, ROM and baseband...
However, it still does it with no particular pattern..the only consistent thing is that it seems to happen when we're out of the house..not turning on or off any particular wireless service like wifi Bluetooth etc...i even tried tapping on the back a few times like some other forums suggested...but that didn't recreate the problem..so I'd really be happy to hear any troubleshooting/suggestions/etc..

truthlesshero said:
So...my girlfriend's galaxy nexus started randomly shutting off in the past few weeks..it was completely stock..so i decided to root it, change the kernel, ROM and baseband...
However, it still does it with no particular pattern..the only consistent thing is that it seems to happen when we're out of the house..not turning on or off any particular wireless service like wifi Bluetooth etc...i even tried tapping on the back a few times like some other forums suggested...but that didn't recreate the problem..so I'd really be happy to hear any troubleshooting/suggestions/etc..
Click to expand...
Click to collapse
heat? is it getting hot? the phone has a safety to shut odd when the cpu temp reaches 110C. but i find it hard to imagine that it reaches 110C just sitting there(unless its plugged in, sitting in a non ventilated area).

If it's doing that and its stock and unrooted then you need to take it back
forgot to remind you to return to stock & locked before taking it back....if you choose to do so

simms22 said:
heat? is it getting hot? the phone has a safety to shut odd when the cpu temp reaches 110C. but i find it hard to imagine that it reaches 110C just sitting there(unless its plugged in, sitting in a non ventilated area).
Click to expand...
Click to collapse
Yeah...i don't think it gets that hot
The phone is just usually in the car..and I've had the chance to hold it right after it shuts off..i wonder if taking the case off..in case, like you said, ventilation might be the problem..

jase33 said:
If it's doing that and its stock and unrooted then you need to take it back
forgot to remind you to return to stock & locked before taking it back....if you choose to do so
Click to expand...
Click to collapse
Definitely..the root toolkit helps and i would able to flash a stock image and relock the phone..

just an extra bit of info in case someone googled/searched for this same problem and fell on this forum...
because after my searches, everyone that has had the same problem doesn't seem to have an answer...and now my phone, who did it a few times in the first few months...now has started to do it almost consistently...
randomly when i leave the house, it just goes to sleep and then the phone is turned off
the phone is NOT hot and it's literally minutes of being in the car or going for a walk, without bluetooth or gps or wifi on...and even when it is, sometimes it will still turn off
no pattern at all...both rooted and not, stock rom and not...stock kernel and not (have tried stock, james bond, and trinity so far)...
i'm going to try uping the min frequency and different governors to see what happens...
i will keep this thread updated

Try to see what happens if you hold the phone screen up and drop it 1 or 2 inches.
I am currently on my 5th Galaxy Nexus from Verizon. Phone 3 and 5 had a problem of turning off in my pocket. Almost every time I took the phone out is was off. I finally discovered that any jarring movement turns the phone off. If I did anything more then gently place it on the counter the phones would shut off. This occurs with the standard battery and back and the slim extended battery and battery back. The phone is inside a Seidio Convert case and this still occurs.

Mr. Toad said:
Try to see what happens if you hold the phone screen up and drop it 1 or 2 inches.
I am currently on my 5th Galaxy Nexus from Verizon. Phone 3 and 5 had a problem of turning off in my pocket. Almost every time I took the phone out is was off. I finally discovered that any jarring movement turns the phone off. If I did anything more then gently place it on the counter the phones would shut off. This occurs with the standard battery and back and the slim extended battery and battery back. The phone is inside a Seidio Convert case and this still occurs.
Click to expand...
Click to collapse
it seems like there's a good chance that's what's happening...as a fresh boot/install of any rom, including stock, and any kernel, any radio, all cause it to randomly shut down. but i noticed if it's NOT in my pocket and i hold it in my hand it almost never ever shuts down...so i'm thinking this is the problem...will keep this updated..thanks

I'm on my 4th Nexus because of "randomly" shutting down
As much as I love my rooted Nexus (4.1.1 ) full_toro_userdebug, after a couple of weeks, each phone has been shutting off randomly in my pocket or just jarring it in any way. I finally seemed to have fixed it by putting a small block of tissue paper the size of the battery between the case back and the battery.
It has allowed me to drop it from an inch or two above a wood table as drop it....It is 24 hours now. I will update with any change.

truthlesshero said:
just an extra bit of info in case someone googled/searched for this same problem and fell on this forum...
because after my searches, everyone that has had the same problem doesn't seem to have an answer...and now my phone, who did it a few times in the first few months...now has started to do it almost consistently...
randomly when i leave the house, it just goes to sleep and then the phone is turned off
the phone is NOT hot and it's literally minutes of being in the car or going for a walk, without bluetooth or gps or wifi on...and even when it is, sometimes it will still turn off
no pattern at all...both rooted and not, stock rom and not...stock kernel and not (have tried stock, james bond, and trinity so far)...
i'm going to try uping the min frequency and different governors to see what happens...
i will keep this thread updated
Click to expand...
Click to collapse
Any updates from you? I am having the same problem in that my screen will turn off and I can't get it to turn back on without pulling the battery. I can tell the phone is still on because LED notifications will continue to blink but the power button doesn't do anything.
Interestingly I've noticed lately that after I pull the battery and restart the phone, it seems to reset the battery stats. For example, tonight my phone has been off the charger for about 2 hours but after I just had to pull the battery, it booted back up and battery stats say it's been on battery for 24 minutes only.
Anyone else experiencing anything similar?

mrlaughter said:
As much as I love my rooted Nexus (4.1.1 ) full_toro_userdebug, after a couple of weeks, each phone has been shutting off randomly in my pocket or just jarring it in any way. I finally seemed to have fixed it by putting a small block of tissue paper the size of the battery between the case back and the battery.
It has allowed me to drop it from an inch or two above a wood table as drop it....It is 24 hours now. I will update with any change.
Click to expand...
Click to collapse
had this problem for several weeks: as long as i used the phone everything went fine but when i put it to sleep and stuff it in my pocket it shut itself down every second or third time.
your tipp with the tissue paper did the trick for me, no shutdown in the last five hours. thanks!

Has anyone found the reason for this happening? first time in eight months, my nexus turned down. first few turning offs phone has been hot and battery normal (70 ,80%). the last time the phone was cold and empty battery (although it was full). i am on custom rom (AOKP).

husko said:
Has anyone found the reason for this happening? first time in eight months, my nexus turned down. first few turning offs phone has been hot and battery normal (70 ,80%). the last time the phone was cold and empty battery (although it was full). i am on custom rom (AOKP).
Click to expand...
Click to collapse
I suspect the phone is turning itself off because of a bad battery connection. I've had my GN for several months and it has just started turning itself off whenever it is in my pocket, and occasionally when I'm holding it. It all began after about a 4 foot drop which caused no visible damage. Reseating the battery appears to help. I hope it's this simple for everyone else.

colinlbc said:
I suspect the phone is turning itself off because of a bad battery connection. I've had my GN for several months and it has just started turning itself off whenever it is in my pocket, and occasionally when I'm holding it. It all began after about a 4 foot drop which caused no visible damage. Reseating the battery appears to help. I hope it's this simple for everyone else.
Click to expand...
Click to collapse
i do not think that the battery connection is here a problem... when the phone was ˝off˝ i tried to call myself from mothers phone and everything was normal (in speaker of her phone it was ringing), but my phone was dead... nothing..
so i came to the conclusion that the phone is not exactly turned off, but the screen is and the power button does not work also. that is why i cant ˝turn on˝ my phone.
looks like the phone is in some kind of standby, but i dont know why this happens, maybe it is rom issue... i switched from AOKP to CM10 and so far (4 days) the phone has not been turned off by itself.

battery connection for me
colinlbc said:
I suspect the phone is turning itself off because of a bad battery connection. I've had my GN for several months and it has just started turning itself off whenever it is in my pocket, and occasionally when I'm holding it. It all began after about a 4 foot drop which caused no visible damage. Reseating the battery appears to help. I hope it's this simple for everyone else.
Click to expand...
Click to collapse
I agree with the battery connection guess. I had the same problem of it turning off randomly and it hasn't happened to me since I cleaned off the connectors on both the battery and the phone. Good luck to everyone else!

i am having the same problem
truthlesshero said:
So...my girlfriend's galaxy nexus started randomly shutting off in the past few weeks..it was completely stock..so i decided to root it, change the kernel, ROM and baseband...
However, it still does it with no particular pattern..the only consistent thing is that it seems to happen when we're out of the house..not turning on or off any particular wireless service like wifi Bluetooth etc...i even tried tapping on the back a few times like some other forums suggested...but that didn't recreate the problem..so I'd really be happy to hear any troubleshooting/suggestions/etc..
Click to expand...
Click to collapse
do you also have dream scene enabled? i have noticed that when i have my nexus plugged in and the dream scene is on that it is hard to get it just to the main passcode screen upon hitting power button.
now the phone just randomly turns off , while in the middle of charging sitting completely still on my desk.
wtf is going on with this phone?

I had this issue when I first got the GN.
Unfortunately, I think it is a permanent hardware issue (at least it was for me). Not due to software/firmware or anything like that. I would get random reboots, sometimes once a week, sometimes twice a day.
I finally had to make use of the warranty and send it into verizon. I got a new one, and it works great! Not a single random shutdown or reboot.

[Q] Phone turns off with SIM but works fine without it

I was running JellyTime R11 on my phone and used the included flashlight app with the experimental 'power light' option for approximately 20 minutes and suddenly my phone turned off. I used a USB juicepack to charge my phone while lighting. I think, though, that this has to do nothing with each other and simply has happened at the same time. I technically cannot explain this to myself...
I tried to restart it but shortly after showing the launcher it turned off again. This happens always with the SIM card but without everything works fine. I also tried to fire up my DHD with a different SIM card from the same carrier without success. And I am pretty sure that the SIM is fine but nevertheless I have ordered one free of charge.
I heard that there is a problem with the case and it doesn't hold the SIM correctly in place but I don't find this forum again...
What could I do next?

Today my new congstar SIM arrived and I replaced it with my old one but I am still bootlooping (Android Revolution 9.0) and my logcat shows totally different last log outputs.
Is this a hardware problem? Should I open my DHD and have a look at the interior?

there is a chance that something got fried in those 20 min. i think that option keeps tle flashlight lit on full power, which it was never ment to. that might cause thermal damage.

t0mas_ said:
there is a chance that something got fried in those 20 min. i think that option keeps tle flashlight lit on full power, which it was never ment to. that might cause thermal damage.
Click to expand...
Click to collapse
Mhm, it was already cold outside but that could be but the two LEDs are far far away from my sim slot?! The battery is still far away...

Isn't there a disclaimer while activating that experimental mode stating that it might cause damage to your phone, its been a long time since I used CM.
BTW yes it IS highly likely hardware damage has occurred because leaving flashlight on for 20 min on extream mode, bit silly IMHO.

I already found the solution for my problem--I just forgot to post it here...
Actually my battery died pretty suddenly and I did not noticed this. I just thought "my phone had a bad day". After replacing the battery with a fresh one everything worked again. As of today I am still using this battery.
The phone died with SIM likely because it needed too much energy and without it had no chance of using cellular network...