Wont power on after being powered off

Try pressing and holding vol up+ power or vol down + power for about 10 seconds. vold up+home+power is an alternative depending what phone it is. If not it's most likely fried or screen went out

HTCs have a known power glitch that affects many of their model of phones. Unplug the phone. Hold down volume down, volume up and power. Do not let go. Plug in power. Hold those three buttons down for NO LESS THAN three minutes. You may see a flashing red light in the process. Once you see solid red, it is in a charging state. Allow it to charge for an hour or so and then attempt to power it up normally. You may want to get a quality replacement battery from eBay or a respected vendor, since chances are you other battery is toast. Li-Ion batteries don't like to sit in a drianed state for very long without loosing their mojo.

Remove the battery for a day, so it will forget its current state. Then put it back in and try again.

My wont turn on too, There is a orange light on the tower, Green on the left, Battery ovel, If I push the restart button, also switch the power supply switch in the back, also unplug from it, Sometimes does it, Do ou know whats causing this to happen, Please let me know Thanks

Get a new charger!!

keep the battery out for 30 minutes, keep the charger UNPLUGGED from the phone. Then put the battery into the phone and charge it, (with the phone off), for the determined time in your cell phone's user manual. (Recommended 3-5 hours)

Hi,

Unfortunately there is not much we can do about it. It is more of a corrupted software issue. First, try doing a power drain. Turn the phone off, take the battery and the MicroSD memory out of the phone. Without the battery and charger, press the power button of the phone for let's say about 15 seconds. put the MicroSD first, then the battery turn the phone back on. If same problem happens, check this out http://www.youtube.com/watch?v=xPYaSHD-rl4

Hi,
In your case, it seems that there might be some hardware issues. fight with your mobile phone vendor to replace it with a new one as you have sent it to service for many times.
Thanks

If the phone charges the battery as it is displayed on the screen when a charger is plugged in but does not power on, the power button/switch is faulty. Have it checked and replaced by a qualified technician.
If the phone doesn't charge the battery, the battery is probably drained or dead. To verify, grab a voltmeter and check the battery voltage. Set the selector knob to 10V DC. Voltage reading of less than 3 volts indicates the battery is drained or dead. Use a known good battery.
If the battery is good but the phone still does not turn on, it is dead and have it checked by a qualified technician.

Take the battery out, plug the charger in, put the battery back in and leave the phone for a few hours, the phone will turn on when its ready, by letting the phone go dead a cell in the battery went criticly low and it will not work again untill the battery gets above that critical point, if the phone will still not turn on after that u will need a new battery. this happens in older batterys