I have had the same problem with my toshiba p55t-a5202 from best buy took it in 2xs then was without a comp for weeks. The 3rd time I just took out 14 screws on bottom(do not loose them) carefully removed bottom cover (push in and up at sides to remove) then found battery. I followed the wires to the middle slightly larger white plug. Then took a very small screw diver and pushed down gently in the flat spot while pulling gently to disconnect the plug. The side lights went out. Then pluged it back in the same way I took it out. I put all screws back on the bottom cover. Pluged it back in and turned it on and whallaa! My lap top was working and I didn't have to be without it for weeks!! I like this comp but will NEVER buy another one with an internal battery. I guess til the next time it not responsive! Ugh! Goodluck!
SOURCE: enable standby and hibernation in my laptop again
You can manually re-enable the Hibernate option via command prompt using these instructions:
"powercfg -h ON"
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