PC does not send updates after CPU change (no signal to monitor)
PC does not send updates after CPU change (no signal to monitor)
I upgraded to an i9 9900kf, but used my stock cooler instead of the i5. Everything functioned normally without overheating. Later, switching to the i5 caused the PC to fail to boot and the GPU LED to flicker. I inspected the CPU socket and removed a small grass fragment, carefully clearing it with an A4 corner. Using my phone's macro lens, I checked for bent pins and found none. After reinstalling the i5, the PC booted correctly.
Next, I purchased a used AIO cooler, the "thunderstorm TS240" from a friend. Assembling it into the case and switching the i9 into the socket, the same issues persisted—LED blinking, no post, no monitor output. I rearranged RAM sticks across all slots, tested single and dual channel configurations, but the problem remained. The GPU LED became static instead of blinking. This seems resolved?
I then tried another cooler, a stock one, and again encountered the same failures. Disconnecting the GPU and using the MOBO HDMI also led to issues. I disconnected the CMOS battery, powered on and off the PC, then reconnected it. The problem continued. Someone suggested the cooler might be too tight.
I consulted my brother’s PC, which had no speakers and no sound output, though the fans were active. I disconnected the cooler and tried a different cooler, but the issue persisted. The CPU socket appeared intact, yet the problem remained unresolved.
I’m still leaning toward the CPU socket as the likely culprit, but need a reliable method to clean it from dust or debris that could cause an open circuit.
The sockets are quite fragile.
Usually one doesn't replace the cpu frequently.
The specifications indicate up to 15 insertions.
After the i9-9900KF started working properly, it seemed unnecessary to swap it out.
In theory, the pins might have lost their flexibility.
Examine the socket pins closely; you might need to replace the motherboard.
You can bring it to a computer shop to check the psu. They have a small device that doesn’t seem expensive, around 5k. The phone model with all the motherboard connectors fits on both sides and you just plug it in to test. Remember to take all the wires with you. We have Canadian computers that do this. The US likely had more choices.