M1-ATX Problems :( Please help

**Rousie** · 04-23-2006, 07:46 AM

It's all been running fine for the past 6 months or so, but now for some reason i'm having a problem.

I used to turn the key (1 Click) and the PSU used to fire up as usual, i could let it get into windows and do my usual things, then when i was ready to start the car, i'd just turn the key the rest of the way and the car used to start up, with no effects to the PC & PSU.

Now though, it turns on with the first click, but when i start my car the PC / PSU Restarts, like there was a power cut or something.

I have checked the Permanent live and all seems fine, no big drops in power on the meter, certainly no `CUT` of power anyway.

So, what could this be? PSU not getting enough juice from the battery or a fault with the PSU itself?

Any help or tests i could perform would be great.
Regards,
Dean

**piabu** · 04-23-2006, 09:32 AM

Use a voltmeter and measure the voltage drop when you crank.

If your battery is weak and drops below 8v or so during crank, the M1-ATX may be rebooting when you crank.

**Sidewalksalvage** · 04-23-2006, 11:02 AM

Definitely possible that the power it dropping to far...
What is the jumper configuration? Is it the way you left it? Its not likely, but possible that one of the jumpers fell off (from a bump or something) and is now causing the PSU to act unpredictably. Have you tried using the PSU without the remote turn on? Try starting the PC without the key (use another switch) then turn the car on. This way you can tell if it is the PSU or voltage drop. If the car can start without it turning off, then look at the voltage level of the remote line, that could possibly dropping to far.