For the last year I have been dealing with intermittent and unresolved screen glitching or unexpected power failures on my Toshiba Satellite L675. At first I assumed it was an overheating CPU so I cleaned out the heatsink and added new Antec Formula 7 diamond thermal grease to the CPU. The problem seemed to be resolved but it started up again.
I assumed the problem was at best a loosened video cable connection, power supply issues, or (at worst) a failing CPU (it contains integrated video). I then opened and re-cleaned my entire laptop, re-routed and secured the video cable connection, and purchased a new A/C Adapter and battery. I also ran Intel’s diagnostic tool on my Core i3-370M processor and everything passed, including temperature. Again, the problem appeared to have resolved itself until the last couple weeks when it began to occur again at more regular intervals (though not generally when in active use).
I assumed the problem was a failing CPU/Vid Card and when the problem occurred again I attempted to plug into an external monitor to check but when I removed my A/C Adapter the computer shut off. Unsure how to proceed I continued monitoring its temperature with Battery Care. Today I noticed that my Toshiba 500 GB SATA HHD was running at 102-107 degrees Fahrenheit which, according to Google searches, was slightly above the 40C max recommended HHD range (and was popping up errors on Battery Care). My CPU, on the other hand, was not exceeding 130F, below the max range. I re-ran the Intel Diagnostic tool which gave my CPU another passing grade so I downloaded the Toshiba PC Diagnostic Tool and ran it on my HHD which gave me “Harddisk Drive Test (C:\) Pass, Harddisk (Q:\) Fail).
My questions: Could a failing HHD result in the screen glitching and power failures? Would switching to a newer HHD resolve the issue or is the overheating related to another issue inherent in the system? Is there another resolution related to these symptoms I haven’t considered?
Intel Core i3-370M 2.4o GHz 3MB Cache
Mobile Intel HM55 express chipset
Mobile Intel HD graphics
Upgraded 8GB DDR3 1066MHz RAM (originally purchased at 4GB)
500 GB Toshiba SATA HDD MK5055GSXN