When i turn the stereo on it only goes on about 2 seconds n then it says PROT on the panel and turns off

Protection mode. look for shorted speaker output, or too muchoutput load (low Ohms, below 3-4)

try the reset again and watch the display. is should say something along the lines of: PS PROT, DC PROT, or I PROT.

There could be a short circuit in one of the speakers. This would cause high current flow thru the amplifier and result in self-protect. Disconnect all speakers from the unit and try powering up again. If there is no PROT, then reconnect speakers one by one until fault found or all speakers are reconnected.

Sounds like a defect to me return it for a working model.

PROT means that the AMP is protecting itself from damage due to bad or incorrect wiring or damaged and or incorrect speakers. Check your wiring and speakers.
If you find no problem then, DISCONNECT YOUR SYSTEM FROM THE POWER, disconnect your speaker wires...all of them, then reconnect the power ONLY, turn on the system and see if it still says PROT. If it does then your amp is damaged.

http://www.retrevo.com/support/Yamaha-HTR-5730-Receivers-manual/id/1075bh230/t/2/

Page 52

1 Hold down STEREO on the Front Panel
"Factory Preset" appears on the front panel
2 Press STEREO to select the desired setting.
'Reset' To reset to factory presets
'Cancel' to cancel without making changes
3 Press STANDBY/ON to confirm your selection

when i turn on my Samsung HT-C550 IT showing PROT and DVD turn off. What this is mean PROT?

i had the same problem a prot display then it would shut down. turns out i had the sub disconnected(noise complaint from the shaking at my apartment complex) but the speaker wires for the sub connected to the amp or central unit. when i disconnected the sub i left the wires on the floor behind the sub separating the pos. and neg. somehow the wires got moved around and the pos was touching the neg. as soon as i noticed and fixed this problem the system was working fine. my samsung hometheater model is HT-BD1250

It sounds like you are drawing to many amps and you need to go to a higher capacity altinator and a second battery would be a good idea as well. Start your car (do it at night makes it easier to tell) turn on your headlights without your stereo on look at head lights and see how bright they are then slowly turn stereo on and up if headlights dim you are drawing to many amps and need a higher capacity alt to charge and stop you from blowing them, and second battery with and isolator so you don't draw amps from the battery that starts your car.

I've been trying to find th thermal fuse on a 42we655 for like 3 weeks...It's not under the lamp...Any one know where it is?

Thanks