02-27-2018 08:36 AM
02-27-2018 11:20 AM - edited 02-27-2018 12:17 PM
Your PC is not successfully completing the Power On Self Test (POST).
All internal chassis work should be done with the system disconnected from AC power. Depress the power switch to drain residual power from the MB after disconnecting AC power from the system. Work in a static free environment or use anti static wrist strap or mat.
I am guessing the system is unresponsive so you cannot get to the BIOS to reset the BIOS to defaults, is this correct?
See if the system will complete the POST after each step.
Disconnect all unnecessary peripherals including network connections and printers. Even try just using a monitor.
Start troubleshooting by cleaning the insides with compressed air and replacing the MB CR2032 battery. Carefully examine the MB and discrete graphics card for thermal damage or leaky or bulging capacitors.
Try each stick of RAM in each memory slot. Swap in a known good stick of RAM in each memory slot. Remove all RAM, power on the system to see if you get a POST error message.
Disconnect HDD's/SSD's, optical drives, and card reader if applicable (one at a time).
Swap in a known good graphics card or use onboard graphics.
Swap in a known good power supply.
Now you are down to a probable motherboard problem. You would have to swap in a known good CPU to verify it is the motherboard and not the processor.