Specs:
Motherboard: ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CPU: Intel Core i5-3470 Ivy Bridge Quad-Core 3.2GHz (3.6GHz Turbo Boost) LGA 1155 77W BX80637i53470 Desktop Processor Intel HD Graphics 2500
RAM: Crucial Ballistix Sport 8GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model BLS8G3D1609DS1S00
PSU: Rosewill CAPSTONE-450-M – 450-Watt Modular Active PFC Power Supply – Continuous @ 122 Deg. F (50C), 80 PLUS Gold, ATX12V v2.31 & EPS12V v2.92, Intel Haswell, SLI, & CrossFire Ready
BIOS is 2.90, which is the most recent according to the ASRock website.
Symptoms:
Powers on, light and fans start, no display, Dr. Debug readout on mobo rapidly cycles through codes before sticking on 4F -- it will then restart the sequence every 10 seconds or so. Beep code sounds like three short beeps, slight pause, three more short beeps, then repeats whenever it goes through the sequence. I've tried removing the RAM and then I get three long beeps and a RAM error code on the Dr. Debug, which seems 'correct' to me and which leads me to believe that the code I'm getting is a keyboard controller error, which could mean any number of things (and yes, I've tried booting with two different keyboards (DAS mechanical via USB and a vintage Model M) and without a keyboard at all.
History:
Had rig since last November, has been working fine. Two days ago, I saw the Patch Tuesday Windows Update was ready (Windows 7 64-bit) and shut down the computer to install it. The next day, the computer failed to post -- I've gradually removed all peripherals from it, including video card and am currently just running off on-board video and the PSU attached to the board (and the CPU of course) -- I've also swapped out the PSU, trying a Corsair TX650M, with the same results. I've also tried resetting the CMOS, both using the onboard button and by manually removing the battery. All of those get me the same results on boot.
I'm thinking at this point that it has to be the motherboard or some sort of short between the board and the case -- my next step is to remove the board from the case and see if it still has issues and if it does, to try and get ASRock to send me a replacement BIOS chip. Then if that doesn't work, replacing the dang thing. I've done a search of similar issues, including on here and none of the various solutions have worked
I'm posting here just in case there's something obvious (or non-obvious) that I've missed and/or if anybody has any good suggestions for next steps.
Thanks!
Motherboard: ASRock Z77 Extreme4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CPU: Intel Core i5-3470 Ivy Bridge Quad-Core 3.2GHz (3.6GHz Turbo Boost) LGA 1155 77W BX80637i53470 Desktop Processor Intel HD Graphics 2500
RAM: Crucial Ballistix Sport 8GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model BLS8G3D1609DS1S00
PSU: Rosewill CAPSTONE-450-M – 450-Watt Modular Active PFC Power Supply – Continuous @ 122 Deg. F (50C), 80 PLUS Gold, ATX12V v2.31 & EPS12V v2.92, Intel Haswell, SLI, & CrossFire Ready
BIOS is 2.90, which is the most recent according to the ASRock website.
Symptoms:
Powers on, light and fans start, no display, Dr. Debug readout on mobo rapidly cycles through codes before sticking on 4F -- it will then restart the sequence every 10 seconds or so. Beep code sounds like three short beeps, slight pause, three more short beeps, then repeats whenever it goes through the sequence. I've tried removing the RAM and then I get three long beeps and a RAM error code on the Dr. Debug, which seems 'correct' to me and which leads me to believe that the code I'm getting is a keyboard controller error, which could mean any number of things (and yes, I've tried booting with two different keyboards (DAS mechanical via USB and a vintage Model M) and without a keyboard at all.
History:
Had rig since last November, has been working fine. Two days ago, I saw the Patch Tuesday Windows Update was ready (Windows 7 64-bit) and shut down the computer to install it. The next day, the computer failed to post -- I've gradually removed all peripherals from it, including video card and am currently just running off on-board video and the PSU attached to the board (and the CPU of course) -- I've also swapped out the PSU, trying a Corsair TX650M, with the same results. I've also tried resetting the CMOS, both using the onboard button and by manually removing the battery. All of those get me the same results on boot.
I'm thinking at this point that it has to be the motherboard or some sort of short between the board and the case -- my next step is to remove the board from the case and see if it still has issues and if it does, to try and get ASRock to send me a replacement BIOS chip. Then if that doesn't work, replacing the dang thing. I've done a search of similar issues, including on here and none of the various solutions have worked
I'm posting here just in case there's something obvious (or non-obvious) that I've missed and/or if anybody has any good suggestions for next steps.
Thanks!