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Problem description: When I press the power switch, nothing happens on screen. No POST, no BIOS info, nothing. The fans in the case spin up. No system beeps. I *think* I can hear HDD clicking, but not sure. My motherboard (ASUS Sabertooth Z87) has red warning LEDs on board for various components, and the CPU Warning LED lights up solid red and stays on. The problem started one day while the system was idling with a normal assortment of programs open (Chrome tabs, Spotify, etc). I came back to the system to find it completely locked up and frozen, the image on the monitor still and no mouse control. I restarted to the above description. Attempted fixes: Bought a brand new PSU and tried booting with that. RMA'd the motherboard next. When that didn't work I RMA'd the processor. Tried booting with no RAM. Tried booting with no CPU. Reset CMOS, pulled mobo battery, held power button for various lengths of time, etc. None of it produced any different results. Recent changes: The motherboard, CPU, and video card are newish but had been working just fine together for a couple months before the problem happened. -- Operating system: Windows 7 Premium 64bit System specs: Asus Sabertooth Z87 LGA 1150 Motherboard Intel Core BX80646I74790K i7-4790K Processor (8M Cache, up to 4.40 GHz) 32gb Komputerbay DDR3 PC3-12800 1600MHz DIMM RAM (4x8gb) ASUS PSU (I forget what voltage, but I haven't had a problem in the past) Crucial 256 GB m4 2.5-Inch Solid State Drive SATA 6Gb/s CT256M4SSD2 MSI GTX 970 Gaming 4G Graphics Card Location: United States I have Googled and read the FAQ: Yes, official FAQs aren't much help. Any ideas? I'm thinking I may just have to eat a few hundred dollars and replace the PSU, CPU, and mobo all at once, but I'd rather not since I just bought these stupid upgrades a couple months ago... 
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Aug 13, 2015 01:32
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| # ? May 1, 2024 11:50 |
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Unplug EVERYTHING from the mobo but the CPU. No hard drive(s), no RAM, no video card. You *should* get post (beep?) error about RAM. Put the RAM in, you should get an error about no video card, etc... Also, have you tried updating the BIOS after getting the replacement motherboard? Treytor fucked around with this message at 02:03 on Aug 13, 2015 |
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Aug 13, 2015 01:58
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Also, are you remembering to connect the 8-pin power connector on the motherboard? Sometimes I forget about that.
Treytor fucked around with this message at 02:32 on Aug 13, 2015 |
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Aug 13, 2015 02:09
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Unplugging everything except fans and the cpu yields the same results. Haven't had a chance to do the bios. I'll try in a little bit. I do have the 8-pin plugged in.
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Aug 13, 2015 02:34
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Can you find out the PSU model?
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Aug 13, 2015 18:59
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Fruit Smoothies posted:Can you find out the PSU model? Antec Earthwatts EA-650 650w
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Aug 14, 2015 00:13
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| # ? May 1, 2024 11:50 |
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Ok, so I got it to boot. I flashed the replacement motherboard with an OLD bios, the first one that the notes said supported my cpu chipset, and it booted up. I then flashed it with the latest bios and it still booted up. No idea. In any case, it seems to be running ok now! Thanks, everyone!
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Aug 14, 2015 06:09
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