On Mon, Oct 07, 2013 at 09:48:17PM -0500, [email protected] wrote: > On September 24, my homebuilt PC (built February 2011) failed to POST. On > power-up the keyboard LEDs did not blink, and there were no BIOS beep codes. > The mobo LED 2-digit BIOS-POST-code/temperature display was unlit and the CPU > fan was not spinning. I suspected that the mobo had failed and did some mobo > troubleshooting steps. I also substituted another PSU. > > I ordered a replacement mobo, which arrived October 7. With the replacement > mobo the PC still does not POST. All symptoms are as before except that the > CPU fan now spins. > > Would someone be willing to help me, either via email off-list (username: > alweiner7 provider: hotmail.com) or in person? I'm near downtown Poughkeepsie > and would be willing to travel within Dutchess County. > > CPU: AMD Phenom II X2, Original mobo: Biostar TA890FXE, PSU: Antec Neo Eco > 520C, Replacement mobo: Gigabyte GA-970A-UD3
In my (older, it's been a while since I've homebrewed a system since I've mostly moved to full-time laptops) experience, a sudden total failure to post is either: 1 - PSU - You got a new one, so it's probably not that. 2 - Mobo - Older mobos have crappy caps which leak and explode, eventually causing failures. New mobo, so probably not that. 3 - Poorly connected hard drive. This was a bigger problem with IDE than it is with SATA, so it's probably not relevant. 4 - Bad, or mis-seated, RAM. If you moved your RAM to the new mobo, it's probably not mis-seated (heat changes can cause flex which can pop the ram slightly out, sometimes), but it might be outright bad. Some systems will power up and scream, some won't even do that. 5 - Bad, or disconnected, fan. The mobo monitors fan speed - and might refuse to power up if the CPU fan isn't connected properly, for example. Also the usual cautionary items; did you connect the aux PSU power, does your video card need aux power and is it connected, etc. If you're used to the older single-connector ATX power systems, newer systems usually need an additional 6 or 8 pin power connector. Of course this could be old news to you, too. --
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