[TouchPad Q&A, Help & Troubleshooting] d1nonlymurt:
while i was experiencing the exact same issue as mentioned above (on top of that, i couldnt find my orioginal charger) so i tried the combination of every single micro usb cable i had, every wall usb charger i had, and then tried every cable in my lap to. additionally, i scoured all forums for a possible solution and tried all the different button combinations as well. hours spent trying to find the original cable/power adapter, and a solution to this problem now just seem a waste, as I should have just contacted webos/palm support first (like i did). here is a transcript of my conversation (skip to the bold part if you want to try something that i didnt read elsewhere on the forums, which i think is what did the trick). I did each of the steps at some point in that night (some before i contacted support and some while talking to him)

Ronold: Thank you for contacting HP Web OS Customer Support. How can I help you today?

12:39 AM	me: hi

12:40 AM	me: i am not able to charge my touchpad

12:41 AM	me: after looking at others having similar issues, i believe my battery was completely drained at some point and now it will not recharge.

12:41 AM	Ronold: I will assist you

12:41 AM	Ronold: Do you see any symbol on the device screen when you connect the charger?

12:42 AM	me: yes, it shows the battery symbol with a one red bar

12:42 AM	me: and then it quickly changes screens

12:42 AM	me: and says that i should plug in the cable and power adapter from HP

12:42 AM	me: something like that

12:43 AM	me: "To reliably charge...."

12:43 AM	Ronold: Inspect the charger for any physical damage, such as cut wires, abrasions, or bent prongs.

12:43 AM	me: there is no physical damage

12:43 AM	Ronold: Are you using an HP-branded AC charger and cable approved for use with this webOS device (for example, the charger and cable that came with the device)?

12:44 AM	met: yes

12:44 AM	Ronold: Try to follow these steps:

12:44 AM	Ronold: Unplug the AC charger and remove the USB cable.

12:44 AM	met: ok

12:44 AM	Ronold: Hold the base of the AC charger (the part with the USB port) with one hand, and the cap with the prongs with the other hand.

12:44 AM	Ronold: Hold the base firmly, and rotate the cap counterclockwise until it stops, and then rotate it back clockwise until you feel it notch into place. This reseats the connectors between the base and cap. Note the position of the prongs before and after to get an idea of how far the cap turns.

12:44 AM	Ronold: When turned until it stops, the cap can be removed. If this happens, replace it by aligning the notches on the cap with the slots on the base.

12:45 AM	Ronold: Connect the small end of the USB cable to the tablet, and the other end of the USB cable to the AC charger. Then plug the AC charger into an outlet. The battery icon should change to this icon to indicate it is being charged.

12:45 AM	me: ok

12:46 AM	me: no luck

12:46 AM	Ronold: What happens now?

12:46 AM	me: same issue as mentioned earlier

12:46 AM	Ronold: Plug the AC charger into a different wall outlet.

12:46 AM	me: ok

12:47 AM	me: no luck

12:47 AM	Ronold: Connect the device to a computer using the USB cable.

12:47 AM	me: ok

12:48 AM	me: same issue on the touchpad

12:48 AM	me: my computer is trying to find a driver for it right now though

12:48 AM	me: nevermind, it says it failed to find one

12:50 AM	Ronold: Press and hold power button and press center button for 30 seconds

12:51 AM	me: showing the same message

12:51 AM	Ronold: Press and hold power button and press center button for 15 times

12:54 AM	met: the screen with the one red bar for battery charging thing flashes, but no message comes up

12:54 AM	me: then 5-10 seconds later

12:54 AM	me: the one red bar with battery charging and hte message follows

12:55 AM	Ronold: It indicates that device has extremely low battery power.

12:55 AM	Ronold: When did you charge the device last time?

12:55 AM	me: its been a few days or longer

12:56 AM	Ronold: You need to charge it for more than 2-3 hours continuously.

12:56 AM	me: i have done so

12:56 AM	me: with no avail

1:01 AM	me: hello?

1:02 AM	Ronold: Battery must have a certain level of charge for the device to turn on. When the battery charge is low, the device shuts off. When it is turned on when the charge is low, the device displays a low-battery screen for a moment and then the screen goes dark again. If the device is plugged into a charger, the device displays the low-battery screen.

1:03 AM	Ronold: Cevice starts when the charge has increased enough, indicated by the HP logo. Startup may take a few seconds.

1:03 AM	Ronold: Device*

1:04 AM	Ronold: As we have done above step, it will resets the battery. So that you need to charge it for minimum 2 hours.

THIS WORKED. i let it charge overnight (which i had done before), but this time it worked. (other things i did that night include holding volume up and power for like 5-30 secs, holding the volume up, power and center button for 5-30 seconds, volume down button)