KGL head unit short press of power button reboots - MTCB Android Head Units Q&A

Hi all,
I have a KGL based headunit running Malays 4.4.
it seems that if I short press the power button the unit crashes and reboots to recovery. I've tried reflashing the MCU and it doesn't seem to help.
this happens randomly
any ideas?
thanks!

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Hello, I tried to install a custom MCU with sound patch and now the unit hardly boots. I got it to boot but it shutted off and I wasn’t able to flash the original MCU. I’ve been trying to get into recovery by holding down the power button until the key backlight flashes three times still holding it for three seconds and then letting go and pressing again.I tried with ADB but still no success.It is a PX30 MTCE LM.
I am sorry I posted this in the wrong place.

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