Chosen Solution
Surface Pro 3 would not start up. Tried all the usual button press combinations and even putting it in the freezer. I did notice the charger LED would sometimes blink whilst holding down the buttons, but nothing on the screen. I suspected the battery, so pulled off the screen with the aid of a heatgun. Unfortunately it reads 8 Volts (versus spec on the label of 7.6V). Label also says the battery is 20 months old. Is there anything else I can try ?
You have it open I would replace the battery. On some tablet the simple act of disconnecting the battery and reconnecting it is enough to restore the tablet . I have however never heard of this working on a surface but Id give it a try
Is this yours or a customer’s. Sometimes this is caused by the CPU overheating on the surface. Because a client had left theirs on during a windows update in a bag and it overheated and never turned on again just turn on no display, post or input. If data is needed from it you can use a mSata adapter to plug into a desktop computer and hope that it’s not bitlocker encrypted.