I have an Aquatron AS07120. When I push the green button, it only stays on for a few seconds and the aquabot doesn't move at all. When I unplug the power supply from the aquabot the green light stays on for about 20 seconds and then cuts off. I am guessing the problem is with the power supply. Any idea what part it might be?

Unplug the computer and wait for a few seconds. Plug it in again and press the power button. If this doesn't work, you will need to take it to a service agent as it won't be user repairable.

the clicking sound is due to the relay is getting turn on but doesn't stay because of bad component in the power supply board or in the main board. you must check first the bridge type diode and FET transistor using an analog or digital tester.

May be you should press the channel button on the set itself or there is a problem with the eeprom of the set circuit.

I have had a problem like this in the past you can try taking the electric access panel usually on the side of the equipment. then look inside you will see a wiring harness inside and it literally takes nothing to bump it loose. This happens when people move these units they are pretty fragile and can be tempermental. Make sure the unit is unplugged while you adjust the wiring harness. If that deosnt work your display board is probably bad. Hope that helps

Try this... unplug the TV. Press and hold the power button for 30 seconds, repeat. Plug it back in and attempt to turn it on.

Unfortunately, if this doesn't work, then the TV will need to be repaired or replaced.

Remove cmos battery and then replace it after 3 mins or so,
Try rebooting
If no luck, remove ram modules one at a time and retest
unplug all but hdd and power connector to mobo, cpu and hard drive and retest.

failing that, could be a surge of electricity has damaged your mobo

I am not sure if this is the manual that you are looking for, or not, but just in case. If you following the link below it will take to you the T2 User's Guide, with the trouble shooting.

http://www.i-love-my-aquabot-automatic-pool-cleaner.com/support-files/aquabot-turbo-t2-manual.pdf

According to the trouble shooting guide:
Pumps Water, but Does Not Move or Moves Slowly
1. Remove any foreign matter that may be obstructing Drive Tracks.
2. Check Drive Belts and Tracks. Make sure they have not slipped out of place and that they're not loose.
3. Observe Drive Pulley, if it is not moving contact Customer Service.