Coby tftv2224 hard to turn on takes several tries

This idea may be worth a try. Look at the buttons on your remote. If you see a button that is marked "TV" give that button a push and then give the "Power" button a push. Wait for a while! sometimes this takes a while to turn the TV on or off. You may have to do this a couple of times depending if the power was off or on when you started doing this. If you started with the set off, sometimes it takes a while for the set to turn on.

Most likely the power board is defective. A new power board will cost $40 to $100 depending on your model. ShopJimmy.com is a good place to look for boards. They are not too difficult to replace if you have a minimum of electronic repair experience.

you need to change your power box there is a bad connection with the wires. its over heating you might whant to buy another at game stop or take it in to get fixed. the more you messed with it it might mess up your whole system.

If you plug the charger into the wall, turn on the power switch and the light comes on, the charger should be working properly. Here is a way to test it-
Attach the charger that came with the power chair to the power chair controller firmly and turn the power chair on, while the charger is running. What should happen:the lights on the controller will scroll back and forth. If this does NOT happen and you can confirm the charger is turned on, the charger handle is fully seated inside the controller receptacle and the wall outlet has power, then the charger may have a problem and needs to be replaced.

If the charger is OK, then there may be a problem with the batteries. Here are some sypmtoms:
1-You connect the charger but the light on the charger never goes red, it just stays green.
2-You connect the charger but the light goes from red to green VERY fast.
3-The charger light goes from red to green but when you disconnect the charger and press the power button on the controller, you only have one flashing red light, or the batteries drain within just a few minutes of use.
4-The power chair has been stored or sitting idle for several months.
5- The power chair has been connected to the charger 24-7 for several months.
Any of the above examples indicates that the batteries are oxidized or damaged and will most likely need to be replaced. The MPV5 takes two, U1 12 volt 33 amp batteries which can be purchased at any battery warehouse store like Interstate Batteries or Batteries Plus.
Good luck!

Try a hard reset, when the ps3 is on hold the power button for several seconds until the system beeps twice

for repair

Try taking out battery and plug in power. If it works, battery is faulty. If not,
Try taking out your hard disk plug in power, if it works, hard disk is faulty. If not,
Try taking out memory card, if there's a sound, memory card faulty. If no sound, it's your motherboard that is causing the error.
Note: If machine is under warranty no need to pay for the repairs.

How many red and green blinks to you see? (What pattern?)

do you see the laser light come on when the disk spins if not it has probably lost power or failed, if so sometimes the laser head gets moved to close to the drive mechanism and the motor cant pull it out. i have found several of these that had this problem.