Sorry for my english

I am from KG.
Ok - here is two ways:
1. - Yours battery isn't conditional, and when you try to start your car, the battery can't give enough power to starter and M2! Then you must charge battery

or just change this battery - take a new one

2. Maby Yours carpc needs more powerfull power supply, then use another psu
I think, you have the 1-st way...
Good Luck