I just got a new EVGA 580 GTX graphics card. After removing my old 280 GTX, it no longer boots my computer. All the LEDs inside my case light up (on the mobo, graphics card, ect), but the little two tone speaker doesn't make any noise to indicate booting up, my monitors don't start up. No BIOS. Nothing.
My motherboard is the MSI Eclipse SLI. I have no onboard graphics. I don't know if my BIOS is still trying to load the 280 drivers, because even when I replaced the 280, it still wouldn't work.
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. You do have a case speaker installed, right? If not, you really, really need one. If your case or motherboard didn't come with a system speaker, you can buy one here: http://www.cwc-group.com/casp.html
You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU.
Motherboard LED's mean very little. When on, all they are telling you is that the computer os plugged into a live power socket and the PSU is switched.
Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.
If no beeps:
At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.
This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.
If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card. Silence or long single beeps indicate a problem with the memory.
Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.
I appreciate the response. I'm going to try to test my PSU tomorrow (Hopefully I can get my hands on a DMM). I'm getting no beeps from my system speaker (Tried it without RAM, without add on cards, without hard drives. No beeps.)
Also, I tried clearing the CMOS, by removing the battery, but nothing happened.
As it stands, I think it's either the PSU, Mobo, or CPU. Shame.
Also, I installed the old card back in, and it hit the same problems.
My PSU is 750 W, more than enough to handle either of the cards.