PLEASE HELP! Desktop computer not showing display.

shadowharren

Reputable
Jan 19, 2016
6
0
4,510
I built this computer myself, and it ran fine for almost a year and a half. Then, the first thing that happened to my computer was that I would have to manually choose through the bios to use my hard drive to boot instead of my CD drive. Failure to do so would result in my computer stuck in an infinite loop of turning on and back off again immediately. I would have to catch it just as it turned on and pull the plug, so it would pop up the "failed to boot" and I'd have time to hit the bios key (F10) to choose to boot from the Hard Drive. That started about 2 months ago. I usually leave my computer on all the time, only turning it off for windows updates, installations of new software, or other times when it's mandatory. I saw a windows update had finally popped up, and I put it off for about 12 hours. I left my house about 8 that morning. It would have reset around 10:30ish. I didn't get back until around 3 that evening. When I got home, I saw my computer stuck in the usual loop and didn't think anything about it. I caught it at the right time as usual, but this time, when I tried to boot, it didn't show a video.
I've looked all over this website trying to find an answer but to no avail. I've tried a different monitor. I've switched out RAM. I've used the paperclip test on the PSU, and it works.) I've taken out my graphics card and tried the onboard graphics. I've even taken out the CMOS battery and reset it. Still nothing.

My specs are as follows:
Operating System: Microsoft Windows 7 Ultimate SP1 OEM (64-bit)
Motherboard: Asus Z87-A ATX LGA1150 Motherboard
CPU: Intel Core i5-4570@3.2GHz Quad-Core Processor
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory
Storage: Seagate Barracuda ES 750GB 3.5" 7200RPM Internal Hard Drive
Video Card: Asus Radeon HD 7770 2GB Video Card
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply

Please help. I've been trying different things every day for almost 2 weeks now. I'm going crazy without my computer.
 

logainofhades

Titan
Moderator
Just because PSU works, doesn't mean it is outputting its rated power. Those Corsair units are not very good, especially when the system is on 24/7. I would recommend changing it out regardless, with a better one, tier 1 or tier 2. http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

Have you went into bios and changed the actual boot order, saving the changes, or are you just hitting the key that allows you to choose boot device, at startup?

 

Barty1884

Retired Moderator
logainofhades is right. I'd start by changing out the PSU for a quality, Tier 1 or Tier 2 unit.
Hopefully that fixes the issue.

As far as it always defaulting to the CD drive, that;s.....different. I'm not sure whether it's related or not, so I'd start with the PSU and see if the boot order problem persists.

Some of the better PSUs available for reasonable prices (prices from PCPP, including rebates & shipping):
SeaSonic S12II 520W - Tier 2 - $56
EVGA SuperNOVA B2 750W - Tier 2 - $45 (out of stock) or $65
EVGA SuperNOVA G2 550W - Modular - Tier 1 - $70 (out of stock) or $75
XFX ProSeries Core 550W - Tier 1 - $56
XFX TS 750W - Tier 2? - $63
 

Barty1884

Retired Moderator
As far as bang for buck from the PSUs listed, they're all quality. They'll all run your system really well.
Technically, either the SuperNOVA B2 or XFX TS will give you a quality unit, with higher wattage for similar prices as the other, lower Watt units.

That being said, the SuperNOVA G2 is fully modular, so there' a benefit from a cable management standpoint.

They're all viable options, and the final call will be yours OP.
 

shadowharren

Reputable
Jan 19, 2016
6
0
4,510
So it ended up being the mobo. The pins on the CPU socket were bent terribly. The power supply showed all signs of being perfect. No cut outs. All voltages matched. I bought a new motherboard (ASROCK B8SM/PRO4/ASM) and haven't had a problem since.

All specs are now the same except the motherboard.