OPUS 150 power to caputer no boot

chirowolf · 05-27-2005, 10:30 PM

I have had my OPus 150 in my carputer for about a year now with no major problem
Carputer:
Fic Icecube P4 mobo
celeron 2.0Ghz
512 ddr
40 gb 5200 rpm 3.5 hd
panasonic 7inch touchscreen wired to psu
no floppy usb dvd drive
usb navigation
today dove about 2 miles to get gas before going to work, turned of my car, carputer goes into standby as always. get back into my car nothing comes up. screen is on adn opus power supply fan running as is cpu fan , but no boot. Unplugged opus to reset but same result. pulled carputer out plugged in standard 150 watt atx power supply and booted with out problem. have checked all the grounds and connections and cannot find a thing wrong. my 12 volt comes in at a constant 11.97 is this too little? any suggestions?

Thanks a bunch

bosstone74 · 05-28-2005, 01:17 AM

curious?

Incinorator · 05-28-2005, 12:31 PM

I'm actually having a similar problem, but on a new unit. I have a Shuttle XPC with AMD Sempron 2600. It works fine off of the shuttle PSU, but when I plug up the Opus 150, all the fans come on but the PC won't boot. I've checked the voltage and it's coming in at over 13V. I've even tried disconnecting all the peripherals. Anyone got any ideas?

Incinorator · 05-28-2005, 01:57 PM

Ok, an update. I measured the output on all the pins going to the motherboard with the Opus and with the stock Shuttle PSU. It looks like the -5V rail on the opus isn't working, which would probably explain why the PC won't boot. Guess I'm sending it back and waiting until they replace it.

chirowolf · 05-28-2005, 02:20 PM

where did you test the 5V rail at one of the acc connectors? at the acc connectors I get 11.7 and 4.7. is this too low to power the system fully?

Incinorator · 05-28-2005, 09:49 PM

That should be plenty according to the readings I got. I tested the voltages on the 20-pin connector on the motherboard. Here's what I got with the stock Shuttle PSU and with the Opus 150.

Shuttle:
Red = 5.16V
Yellow = 11.61V
Orange = 3.35V
Blue = -12.36V
Green = 0.20V
Gray = 4.02V
Purple = 5.07V
White = -5.06V

Opus:
Red = 5.13V
Yellow = 12.41V
Orange = 3.47V
Blue = -12.67V
Green = 0.06V
Gray = 4.29V
Purple = 4.97V
White = 0.00V

Incinorator · 05-28-2005, 10:26 PM

Hmm, found this site:

ATX Connector Pinout

That said that the white wire might be no connection. It looks like the -5V might only be used on motherboards with ISA slots? Now I'm lost again as to what the problem is...

chirowolf · 05-29-2005, 09:36 PM

I still have no clue whats going on with my system. I will have to call Opus on tuesday. If anyone has any ideas, stoot them my way

Thanks

giddonah · 05-31-2005, 08:27 PM

we might not be in the same boat, but maybe we're in the same body of water:

http://www.mp3car.com/vbulletin/power-supplies/51160-opus120-wont-start-comp.html

Mine is brand new though, haven't had it running yet off the opus.

Incinorator · 06-17-2005, 08:39 AM

Well, they found the problem. Even though the whole system only draws about 100W, it's overloading the 5V rail. The Opus 150 maxes out at 10A and my system with just processor and memory was drawing 13A, and with video card 17A. It looks like I'm just going to have to go with an inverter. Maybe I can get a pure sine wave one.