intermittent refusal to power-up

**nasa** · 07-09-2008, 08:52 AM

Hi again,

I just can't win...

Every so often (like this morning) my Opus 120W power supply will fail to power up as it's suppose too. It requires removing the power connector (maybe doing it a couple of times) and reconnecting it after a few moments to get it to start up again. This problem has been existing for a while now. I haven't noticed a pattern for when it works correctly vs when it fails to start. The problem has existed over multiple DC-DC adapters -- so I don't think it's that. But, if I assume that -- I'm not sure where I should be looking. I should note that I do have a valet switch that kills the 12V power to my computer.... However, it doesn't usually work. Well, the 12V is cut off -- but switching it back on doesn't mean the computer will restart. I have noticed this consistantly when I have had a computer freeze, that using the valet switch causes issues with trying to restart the computer. That said -- when my system does power up, power seems to work just fine.

It's similar to the problem document here:
M3-ATX problems.

However, no solution is ever listed there....

A listing of what equipment I have installed is listed on my worklog:
http://www.mp3car.com/vbulletin/work...worklog-2.html
post #18 has a diagram that may/maynot be helpful.

**nasa** · 07-09-2008, 05:13 PM

As a side note....

I have run the computer for 2 days straight inside my home -- powered via an ATX power supply. I didn't have any issues with crashes or restarts. I had brought it in to test for the volume weirdness I am seeing.... (didn't figure anything out on that either, more on that on my worklog).

**nasa** · 07-10-2008, 12:15 PM

**kaoskube** · 07-28-2008, 05:55 AM

With my Opus 120w. I went as far as using a power inverter with an atx power supply in my car, works perfectly. But when the opus is connected, I get the 1 sec flash but it will not turn on the computer. Or even better, it will power up, but not POST.

I was thinking I needed more wattage at first, but I only have the Intel Atom board, and IDE hard dive a the moment, and some times it does boot....