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if your tv 52" silverish color hd model,problem is on power supl.deflection module(module is on left hand side),famos for number of problems,importent to indicate if green light on front panel comes on and goes off in 3-5sec.if not tv has bad fuse(put 8 amp) if blows as soon as plug it in-bad diode on the same with fuse module.
fl231 is the convergence fuse, and is soldered to the board in proximity of the convergence ICS, on RCA rear projection TVs.
If fl231 has blown, TV usually does not turn on at al, if you get bowed picture, that means that the convergence ICs must be replaced.
The fuse is on the same board where you find convergence ICs, if the fuse had blown, or the pico fuses at the base of the STK convergence ics had blown, the STKs must be replaced. There is need of purchasing the service manual to do the job.
It takes a star driver if I am not mistaken to take the back off probably two different sizes one for the top bottom and sides and one size for where the rca jacks are.. I only recommend checking the fuse...if blown never put foil around it. Takes a 4 amp. 5 amp would be ok. Dont go over this. If the fuse is good you should take to a good tv repairman. If blown and blows the fuse you put in take to tv repairman. Anything past this is highly technical. Hope you have a blown fuse only.
Sounds like the front panel buttons are locking up the micro,unplug the unit and remove the back cover,just below were you removed the top screws you can look and see the top of the picture tubes,in fron of the middle tube is a small board,unplug the top left cable and this should restore the unit till you get the set serviced,this will not harm the set,the front buttons just wont work