Power Surge :-S

**rob_69er** · 09-18-2006, 10:49 AM

i hope this is the right place to post this. :-)
my car pc powers up and works fine ( with the engine off ) as soon as i turn the engine on then try turn the pc on it dont work ?? i have to disconnect the power lead and reconnect it to get the pc working again.
what could the problem be ?? could the power wire not be the right power for the pc

**krustydawg** · 09-18-2006, 12:50 PM

Need alittle more info.
MB=
Power supply=
wire gauge=
and where you are getting your power from?

krusty

**Nomader** · 09-19-2006, 07:59 AM

my guess is you are using an inverter..right? if so the inverter stops inverting power when you crank the engine as the voltage drops below a certain level (it can reach 8 volts) so you need to disconnect it and reconnect it.. there is nothin you can do about it but to go to DC-DC or get a better inverter..

all that is if you are using an inverter

**rob_69er** · 09-21-2006, 05:37 PM

Bit more info
I have the car Pc linked to my 2nd battery. and my 2nd battery linked to my 1st battery with 4awg wire.
its M10000 mother board that uses ATX power supply

Built-in 12V DC-DC converter
( i have no idea of the AWG of the carpc power wire its thin )
i belive its a power surge or lose of some sort as it works fine when the engine is off :'(

**rob_69er** · 09-22-2006, 09:49 AM

:'( it still dont work when engine on

**Nomader** · 09-22-2006, 04:47 PM

do u know what the built in DC-DC converter is? what type? check your battery voltage when your car is running..

**rob_69er** · 09-22-2006, 04:48 PM

Thank's for the help but digital-car.co.uk Helped me fix it :-)

For any one that has the same problem

Originally Posted by LinITX.com

ok, the problem that you are having could be because the 12V DC-DC psu in the C156 does not regulate the 12V input from the battery. It just pushes it straight through to the mainboard.

When the car is running the voltage from the battery is likely to be nearer 14V and you could damage your mainboard and drives by feeding them too high a voltage.

To use the C156 in your car, you really need a regulator such as the Carnetix CNX-P1260 or CNX-P1290.