I've had my Sony Vaio laptop for around 10 years now. Works fine, still love it. However, as of late, I found that the screen keeps freezing randomly from time to time. Ctrl+Alt+Del doesn't work, so I am forced to turn off the computer manually. I've looked through the Sony support topics with regards to freezing screens (reset BIOS, updated my computer) but the same problem still persists.
The same problem occurs even when I run safe mode, with the added issue of my laptop suddenly restarting itself.
I've also noticed that whenever this happens (screen freezing), the amber light beside the green and red ones stops flashing. I don't know if this'll help.....
We're sorry to hear that the attempt to fix it didn't fix the issue, We appreciate you for sharing the steps that you've already done. The PCG-7184L is the chassis of the unit. Please verify the model number and the current operating system of your laptop. It should start with VPC or VGN.
For additional troubleshooting, please refer to the link below,