Chosen Solution
Hi all, Yesterday I went to use my Toshiba P50-A laptop and found that it was completely dead. I had left it closed and in sleep mode as I always do, and I found it powered down with no LEDs on (it was plugged in). The power button does nothing at all. So far I have tried: Holding down the power button for 10+ secondsTried a different power supplyMeasured the power supply output (19 V, as expected)Pressed the reset button with a paperclip for 10+ secondsOpened the laptop up, disconnected the battery, and held down the power button for 30+ seconds. Reattached the power supply - nothingMeasured the voltage where the AC plug connects to the MB (still 19 V)Removed the RAM boards one at a time After each of these it was still completely dead. What could be causing this issue? Is there anything else I can try? It’s only a 3 or 4 year old computer and I’d hate to have to replace it so soon : (. Thanks for your help!
Open the laptop and look for blown MLCC capacitors or burn marks on the board . MLCC capacitors will be darker on one end if damaged or will show cracks . Test for voltage of the board at voltage test points around the board . Get the board number from the board and google Voltage test points .This should give you a schematics for your particular board and there voltage points This may be a good place to start Hope this helps
