Ive been having an issue with a Dell Inspiron 7520 15r laptop. I figured that I had damaged the motherboard a couple of years back and probably the processor too. I bought a new motherboard and processor, along with a new battery and other components. After connecting the fan/heatsink, processor, memory, and the screen, I tried to power it on. It actually worked, but the screen had damaged pixels and booted with a red screen. Apparently its called the red screen of death. I had only the above components connected to my motherboard. No HDD. No speakers, NIC, etc. It turned off after about 10-15 seconds, to which I assumed was because of not having my HDD plugged in. Just saw the BIOS.
A week went by and I have tried to start it up again with the intention of booting with an HDD. Nothing.
Nothing works. I am so confused as to what happened. What component could be causing issues. Its a brand new motherboard, brand new processor. I have tested the battery and power jack with a multimeter. I can't figure out what component could be causing the issue. I dont think you even need the memory to boot the motherboard.
Please help me diagnose what could be wrong. I am lost and lacking direction.
I would immensely appreciate it.