I hate to say it, but I've not seen anyone come up with a solution to this one that didn't involve taking the TP apart (if I'm even remembering that correctly).
Originally Posted by explore2
Wait for a few days to see if someone more knowledgeable than I has a fix. If not, this last-ditch effort occurs to me: Try running the battery down until the TP shuts itself down, immediately plug it into the stock HP wall charger (not the Touchstone and not any other wall charger), then walk away from it for 4-6 hours while it (hopefully) recharges. If it doesn't automatically restart during that time, press the power button; if that doesn't work, try the power button and center (home) button together.
Don't try this unless you can be right on top of it to plug it in as soon as it shuts down--there's the risk of the battery's becoming too depleted to run the charging system (yes, the TP needs some battery charge remaining for the charging system to function, and the battery will continue to discharge even after shutdown).
Maybe, just maybe, that will reset the hardware. It may also permanently brick your TP, so please consider that before trying it.