So my PC is getting up there in age (circa 2000), and I wanted to upgrade some things, make a file server out of the old PC, and buy a new PC. As part of this process, I also wanted to reduce my PC noise, as it is quite loud. Started with a new Antec quiet case. Assembled everything and had things working fine. Still running W98SE for now and I had the following system System Info: Abit KT7A-RAID MB (AWARD BIOS) AMD Athlon 900MHz socket A processor 1 256MB RAM in DIMM0 1 512MB RAM in DIMM1 IDE0 – 80GB Seagate Master (W98SE bootable partition), 120GB IBM deskstar Slave IDE1 – Plextor 10/12/32 CDRW Master, Pacific Digital (BenQ) Dual layer 16X DVD writer Slave RAID array – 120GB Seagate, 120GB western digital; in mirror Dlink Ethernet Card Soundblaster PCI128 Modem Creative video card (can’t remember the model) I think that about covers it. So the PC was running well after HOURS of driver and firmware upgrades, however with the new quieter case, I could hear the Northbridge and CPU cooler fans. So I decided to spring the $40 to buy a quiet Zalman socket A cooler and a passive Northbridge heatsink. Everything looked nice and went together fairly easily. I did have a little bit of a problem installing the CPU cooler as I (in retrospect, foolishly) left the Mobo in the case while changing these parts. With the PSU it was tight getting the clips on and off. A few times my screwdriver slipped off of the clip. I didn’t think much of it at the time. BTW, both heatsinks came with thermal grease. I cleaned both chips off and applied new thermal grease. Heatsinks were seated securely on both chips. Everything looks good, so I tried to boot. And my troubles begin. When I press the power button, Mobo, case and PSU fans all spin. Also my Ethernet card lites up a green LED and front panel lights come on. After ~1sec, the motherboard lets out what could be described as one long beep. There are a few little blips, but no actual pause in the tone. No POST and no BIOS loading. Then the PC shuts itself back down. Keeping in mind that the PC had no problems and booted fine before the heatsink upgrades, I did the usual, removed everything from the system, went to one RAM stick (I tried both sticks) and the video card. Also tried no video card, no RAM (just Mobo and CPU), etc. all with the same result. Finally in desperation I tried resetting CMOS to default. Behavior was the same every time I try to boot. Did some web searching, and found that I had installed the CPU heatsink in the way NOT recommended by AMD. The Forum won't let me link with a URL, but I found AMD’s Socket A heatsink installation guide through Abit's site. It says not to attach the CPU heatsink at an angle. In other words, I attached one side of the clips and then pushed the heatsink down at an angle to attach the other clip. I fear I may have cracked my processor and/or damaged my Mobo. I did not do anything (with the exception of the screwdriver slip) that could have damaged parts. I actually have a static strap that I wear to ground me out and I am carefully about handling components. So I have narrowed it down to either the Mobo or the CPU got damaged during my heatsink changing. When I get home tonight I plan to remove the Mobo from the case and inspect more carefully to see if anything is visibly wrong. Might also try on the old PSU just to be sure. I do not have another Mobo or Socket A Athlon CPU to test with. I want to determine what my problem is as quickly as possible. I would prefer not to have to take my Mobo and processor to a shop and have them test it, as it is kind of a pain for me. Is there any other way for me to tell for sure which component is damaged? Can the beep be used to determine what is damaged and what is not? Any help would be greatly appreciated.