Laptop screen is blank upon startup, CPU fan not running

Fireflasher361

Distinguished
Sep 9, 2014
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18,525
Within the past few weeks, an issue has arisen with my Toshiba laptop. Upon startup, the lights on the side turns on to indicate the machine is powered on, however the screen is completely black and unresponsive. I also noticed that from the sound of it, the CPU fan is not turning on upon start up as well.

I have tried many solutions so far:

-Removing battery and power cord and holding power button for 30 seconds, 1/2 minutes to
release excess power from system

-Removing the battery, plugging in the power cord and turning the laptop on

-Removing battery and hard drive but connecting the power cord to the laptop and turning it on

-Swapping the location of the two RAM sticks

-Removing the two RAM sticks and placing only one of them in the slots (did for both)

-Connecting the laptop to a separate display

Unfortunately, none of these solutions had any effect on the laptop and remained unresponsive.

The laptop model is: "Toshiba Satellite L655" and I've owned it for around 4 years now.

I've done some fair research online but I have found nothing that caters to my problem and if anyone with more knowledge than I clearly have can perhaps solve my issue, it will be greatly appreciated as this is nearly my last resort.
 
Solution
Motherboard may have went bad based on your testing. You've already tried the usual tests and tried connecting to another monitor. Did the laptop have adequate ventilation over the 4 years, or was it used on a bed, ect.? Could be the heat over time warped the board, or fractured a solder joint. I've also seen/worked on more than 1 Toshiba notebook in recent years that had a motherboard go bad. You could try removing the CPU(if it's socketed) and reinstalling w/ fresh thermal compound. Even though it's physically powering on, it's not POSTing by the looks of things.
Motherboard may have went bad based on your testing. You've already tried the usual tests and tried connecting to another monitor. Did the laptop have adequate ventilation over the 4 years, or was it used on a bed, ect.? Could be the heat over time warped the board, or fractured a solder joint. I've also seen/worked on more than 1 Toshiba notebook in recent years that had a motherboard go bad. You could try removing the CPU(if it's socketed) and reinstalling w/ fresh thermal compound. Even though it's physically powering on, it's not POSTing by the looks of things.
 
Solution