Opus 320 Won't power PC

**nikkobenson** · 09-17-2007, 09:56 AM

Good morning,

I bought an Opus 320 watt from MP3Car.com store last week. I have it all hooked up correctly (3xyellow - '+', 3xblack - '-', 1xred - 'ACC'). When I turn on the car, the opus led goes solid green. The led on my motherboard turns on, and my USB accessories get power (I have a USB hub that has a light in it, that's how I know).

But the PC doesn't turn on. I've tried to even turn the computer on by plugging the power button back in while the Board was getting power, and that didn't work either. The fans won't spin, and there is no VGA signal.

I tried 2 PCs - AtholonXP 2800 (stock clock) and a Pentium4 1.4ghz; same result with both.

I have 1 standard 40gig HD, 1 DVD drive, and a USB hub which is plugged into the lilliput. 512 meg of RAM (1 stick) and an ati 9600SE fanless video card.

From reading other posts, the OPUS 320 should be plenty to power this setup.

Car is a 2000 Cadillac Deville DTS

Can anyone help?

**strohj** · 09-17-2007, 10:04 AM

can you try powering your setup with a regular power supply? if that works you need to go get a ATX power supply tester... nd test your Opus to make sure it is working fine

**nikkobenson** · 09-17-2007, 10:14 AM

Both PC's do power up with a regular ATX power supply. In fact, the Pentium 1.4 ghz was in the car being powered by an inverter until I bought the opus.

I just bought this Opus and had it shipped over night to me. It's so disappointing when things don't work as you expect them to.

Anyway, do you have any idea why I would be getting USB (is that 5volt) but nothing else works? No processor fan, nothing.

Also, where do I buy a power supply tester?

**strohj** · 09-17-2007, 10:20 AM

it might just be that one of the power lines on the opus is dead.. its rare.. but it happens.... get a ATX tester and you will find out

**nst6563** · 09-17-2007, 08:26 PM

I have an opus 150 and had a similar issue. Turned out that I just needed to match the polarity on the power button wires on the motherboard to the polarity of the power button connection on the opus.

When the PC should turn on, do any lights flash on the opus? Double check your ground too.

**nikkobenson** · 09-18-2007, 09:54 AM

Do any lights flash? Depends on the orientation of the power button wires you speak of. In one direction I get no flashes what-so-ever; just a solid green LED. If I switch the lead around, the led flashes twice when I start the car up.

**Cheekz185** · 09-18-2007, 10:06 AM

do you have the power switch connected from the opus to the motherboard?

**nikkobenson** · 09-18-2007, 02:43 PM

Yes I do, I've tried it both ways to make sure I had the correct polarity.

**Cheekz185** · 09-18-2007, 02:48 PM

do u have a multimeter? Check the voltage on each line... Check to make sure you have at least 12v on the 2 yellow wires and make sure the remote (red wire) has 12v.

**nst6563** · 09-18-2007, 03:22 PM

You should get a solid green light if the PC turns on. If it flashes twice, that indicates that the Opus experienced a problem starting the PC. Good idea to check the voltages too, one of them is labeled "power good" and if that line does not read correctly the board won't power up. I don't remember which line that is though and right now I'm at work so not a lot of time to dig it up.