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TLDR:
I put in new computer parts but my computer booted up fine.
Then I replugged my HDDs and there is no longer any monitor display or POST.

Alright, so an hour or so back, I put in my some parts shown in my spec on my motherboard GA-965P-S3 Rev 3.3

This is relatively urgent because I have a test in 2 days, and I really shouldn't have been spending time putting in new computer parts to start with.

These new parts were Titanium HD sound card, GTX 460 SE, and TX650W PSU. I will bold the main points to save you guys some time if you don't want to read the whole thing:

The first time I booted it up, there was no post or screen display. But this was because I forgot to plug in the 4-pin cable into the motherboard. After I plugged it in, it booted fine and I went immediately into the BIOS to set USB-HDD as first start device (I wanted to reformat my SATA HDD which was used for data storage).

For some reason, it booted into my IDE HDD insteadSo I closed the computer and unplugged the 4-pin molex from the IDE HDD to ensure only the SATA HDD that I wanted to reformat and the USB flash drive could be read.

The loading screen of the windows 7 installation hung once (I was getting some food so maybe I misinterpreted the time) so I restarted the computer, and the second time the installation loaded perfectly. Then I realised I never even backed up my data on the SATA HDD.

When I put these new parts in, I moved the SATA cable on my motherboard from SATAII1 to SATAII0 (when I first got the SATA HDD, I plugged it into SATAII0. The loading screen would go about halfway until the point when it has text about which HDDs are detected and then it would hang. I think that was because the computer was trying to load an OS off the SATA HDD. I moved it to SATAII1, and maybe that gave the IDE HDD priority as it booted up normally again).

So anyway, I plugged in the 4-pin molex back into the IDE HDD and it only passed half of the load screens until it got to the screen when it detects the HDDs and shows it in white text on a black background (as described above). I figured this was because I switched the SATA HDD to the SATAII0 slot.

I then switched it back to the SATAII1 slot, turned on the computer and the monitor cannot receive signal from the computer anymore all of a sudden. I switch it to SATAII0 again and still the monitor won't receive any signal from the pc. It's just like when my 4-pin isn't plugged into my motherboard! I replugged it just in case to no avail.

I find that if I press the power button again after a few seconds of the system powering on, it will shut down immediately. If I leave it on for about a minute, and I press the power button, it won't shut off for quite a while. As if the computer is actually running. Like other post issues, all fans and lights and what not all run perfectly.

I think that since I put these new parts in, I haven't been hearing any POST, even when it did start up properly (loading the IDE HDD instead of the USB drive, loading windows installation). I would think its the GPU or sound card, but my computer did start and display properly.. It only ran into problems when I replugged the HDDs

I tried to clear the CMOS by taking the battery out, and I tried to remove the power cable and hold the power button down on the pc but neither of these things seems to help.

Any and all help right now is GREATLY appreciated.
Edited by AnotherLevel - 11/1/11 at 6:27am
Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Quad Q6600 GA-965P-S3 Rev 3.3 GTX 460 SE Corsair XMS2 DHX DDR2-800 4GB 
OSPower
Windows 7 64-bit Corsair TX650w 
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Computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Quad Q6600 GA-965P-S3 Rev 3.3 GTX 460 SE Corsair XMS2 DHX DDR2-800 4GB 
OSPower
Windows 7 64-bit Corsair TX650w 
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Reply