Unstable new build. Unable to diagnose issue.
Posted on 2009-12-30
Hello everyone, I'm having a very serious issue with a computer I built last Friday.
First of, the specs:
Motherboard: Gigabyte GA-MA785GM-US2H
CPU: AMD Athlon II X2 240
Memory: GSkill 4GB (2x2GB) DDR2 800MHz
HDD: Seagate ST3500418AS 500GB SATA
PS: Corsair 400W
Maxtor 200GB drive PATA
The main issue: I cannot install any OS. I get disc read and I/O errors with every media I've tried. Sometimes during different times. I tried installing Ubuntu 9.04 on my laptop and it works just fine. Because of this I thought at first it might be a failing DVD drive, since it was giving problems sometime ago too. I have no original media, but some of this dvd's are working on my laptop so.....
I tried the following already:
Replaced IDE cables and SATA cables.
Check jumpers on old HDD and old DVD drive.
Unplugged IDE HDD.
Replaced DVD drive, got a new SATA DVD drive.
Disabled AHCI, set it to legacy IDE.
Tried downloading linux ISO's multiple times with no luck.*
Played around with BIOS settings.
Tried with each memory module at a time.
Left memtest86+ running overnight.... No errors at all.
Updated the BIOS.
Nothing has worked so far. Nothing, nada :(. I had to install Ubuntu to an external drive, and then hook it up to my PC. And that's what I'm doing ATM, but I've also noticed some odd behavior:
-At first, the bios stalled for 5 to 10 seconds in the "Detecting AHCI drives" screen. That doesn't happen anymore for some reason
-Sometimes, maybe 1 out of 20 reboots, I don't nothing more than a ñ and a blue box character on the screen.
-It takes a very long while for the monitor to get any signal from the DVI connector on the motherboard.
The weirdest part:
-I tried checking the md5 checksum of some Linux ISO using md5sum under linux. Every single time I did the test I go a different checksum.... yes, I have no idea wtf is this.
-I've tried downloading the same Ubuntu ISO several times now, everytime they are corrupted, every time I get different md5 checksums.
-For some reason I can boot from my external usb drive but I cannot boot from my USB pen drive.
I'm running out of ideas. This must be either the motherboard or the CPU.... but I have no idea and honestly I really don't have that much money to spend, that's why I got such a cheap CPU in the first place.
Any ideas at all?