I just swapped some parts to my computer worked fine before now I am getting a post code 99. I can't get to windows or anything... My mobo is showing 99 too At this point I have tried all of the following: Disconnecting HHD (SATA and POWER) Disconnecting Opitical Drive (SATA and POWER) DISCONNECTING ALL F-PANEL (PWR SW, PWR LED, HDD LED, RESET SW) Disconnecting the USB and HD AUDIO Disconnecting ALL fans. Mounting and remounting the motherboard Mounting and remounting the CPU Attempting to use a new video card Attempting to use a new power supply Placing MOBO on a different surface Reseting the CMOS via the on board button and removing the battery Using only 1 stick of ram to boot New PSU Basically I am booting the PC with the power button on the MOBO and the only things connected are the 8 pin MOBO power, the CPU, 1 stick of ram, and 2 different working video cards. After doing all of those things, the MOBO stills post code "99" on the screen and on the MOBO itself. Additionally, keyboard does not work. Furthermore, I cannot access my BIOS or boot screen. The original video card and the replacement video card both work on another PC therefore they are not the problem. Thus, at this point, I have narrowed the malfunction down to either the following two components: Motherboard CPU (which I doubt, but do not have a AM3+ mobo on hand) Any suggestions or advice are more than welcome and needed. I am considering RMAing the motherboard... This process will most likely be 2 weeks and they may send it back saying it works it is my CPU... ADDITION (7-18-2012): On a side note, I decided to remove the processor. The processor and the heatsink became merged together. What I mean when I say they became merged is that the thermal paste become basically a superglue between the heatsink and the processor (the FX-4170 naturally runs hot, thus, AMD has included an upgraded heatsink in it with better thermal paste). Anyhow, in order to remove the thing I could only get the mounting lever about a little over half way up. Therefore, on the back row, the pins bent a little (I would say there were making somewhere between a 80-85 degree angle orthogonal to the board). I took a credit card and a screw driver and straightend the pins, stuck it back in, still posted the same thing. Last but not least, I read over the mobo specifications and realized that it was backwards compatible. The MSI 990FXA-GD80 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard supports the following CPU types/sockets: I realized I had a (working) AMD CPU HDZ955FBGMBOX Phenom II X4 955 Black Edition 3.2GHz AM3 125W Retail, thus, I mounted it on the MOBO... SAME CODE POSTED... It must be the motherboard.