Hey everone, I could really use your help. I just put together a new pc and it won't boot up. I can hear a fan turn on (I think it's the PSU fan) but I get no display. I have a XFX nForce 750a SLI Mobo in it. Over by the RAM there are four red LED lights on it than are on. They ar labeled LED_DIMM1, LED_DIMM3, LED_DIMM2, LED_DIMM4. I have a theory that my power supply might be too weak for the system.It's a 550w PSU. Any help would be appreciated!!!! and thanks in advance Specs: XFX nForce 750a SLI Mobo AMD 9500 Q4 2.2ghz 8GB (4x2gb) Corsair dual-channel DDR2 Seagate 500gb hd 2 XFX 9800GT video cards SLI 3 PCI cards
I've been doing some studying on DIMM and it seems to be about the RAM so I tried reseating it, but it didn't do anything
I think it's unlikely, but what brand is the power supply? (Wattage is almost irrelevant compared to brand as most cheap PSU brands lie severely about how powerful their units are)
Was the system a TigerDirect barebones kit? They tend to use XFX boards and Ultra power supplies. Neither are particularly good. What happens if you boot the system with just one stick of RAM installed? (Try different sticks to be sure)
It was a TigerDirect Barebones. I tried just one stick (a couple different ones) and the correcponding light lit up and it didn't boot. I swear I saw the cpu fan twitch though when I turned the psu back on (It may have been doing that the entire time though).
The CPU fan would usually more than just twitch. Do the hard disks and graphics fans power up? Even if a system is failing POST, the graphics card fans and hard drives will spin up. If they don't, then it's probably a faulty PSU, or the system is running an emergency shutdown (did you attach the CPU cooler correctly?)
Nothing else spins up. I'm not even sure how the cpu cooler could be on wrong, I didn't realize there was more than one way for it to go on, but I'll check.
When I pulled the cooler off I noticed this weird substance between the cpu and the cooler. It's hte exact same size as te cpu. It turned my finger blue. I have no idea what this means
Ok I put the cooler back on, put one stick of RAM in and tried it. Same thing happened but I definetly located my sound and it appears to be th psu whining. I'm going to take a multimeter and test it now. Thanks so much for your help so far
PSUs have two power modes, a main and an auxiliary, when they shut down, they run in the auxiliary, they don't turn off altogether.
Ok my multimeter showed that the mobo connector had power, but the peripherals connectors had no power.
That being the case, tomorrow i will try it out in an older system and if this is the case I'll replace it. Do you think this psu is powerful enough to run this system or should i think about an upgrade?
