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Hi Thanks for using FixYa. From what you have described it seems that you have to
replace the convergence IC and also check the power resistor, if values are not
exact you have to replace them. These ICs are located behind the black heat
sink; you can see once you open the back off the TV. Also, the convergence
board should be checked for cracked solder joints and please make sure to check
the resistors as if they are shot the ICs might blow again. All this is only
recommended if you have electrical expertise and know how to solder/re-solder
components, if not then you should get this done by a professional. The typical
cost to get this fixed by a pro is around $250-$300. Please do accept the
solution if the issue is resolved or else revert for further assistance.
No,U have solderwicks?U can buy it,in any Radio Shack store.Use solder iron on top of the solderwicks to soap up the solders out ICS pins.Replaced the ICS use any kind solders just resoders ICS back to the heatsink.Tries Websites Tv repair World.com,Tv repairkits.com to buy a complete convergence kit.
You have bad grounds on the solder side of the main board and maybe the crt board. If you can have someone pull the board out..do so carefully. Wait a few days to let the power drain from your tv before examining it. Look extremely close to any and all ICs with a heatsink attached. To the untrained eye it may look OK...but take a real effort and a magnifying glass and inspect closely. Look for cracked rings around the pins of these ICs. Resolder these and do not run solder between the pins. Use solder wick to correct this. Good Luck....you best effort may reward you...just remeber to be careful!
The three blinks indicates a convergence IC fault. The convergence ICs must be replaced with the manufacturer replacement part. Use only the original replacement part. Your set uses STK392-110 convergence ICs. These ICs are mounted on a large heat sink. Yes, you can replace it yourself and save few hundred bucks. But you must be knowledgeable enough on how to solder, resolder and use a multimeter. You will need:
Heat sink grease or thermal compound
Small side cutter
Feel free to inform me if you decide to replace the ICs yourself
The problem is either poor solder connections on the convergence ICs ore defective ICs. If you can solder, you can fix this yourself. Be aware however, of dangerous high voltages that are present even with the set unplugged. The ICs are STK392-120s and should be attached to a large heatsink. Try resoldering the pins first. If that fails to resolve the problem, replace the ICs.
Did you replace both ICs? If so check the solder connections if they are ok you may have the resistor that controls the blue vertical yoke open. Check the resistors for one being open if the solder looks good on the pins of the new ICs
It looks more like an open solder because you were able to align it properly after replacing the STKICs, if there was an open resistor(s) you would not be able to get it align.
I would suggest to go back and double check the solder joints on the STKICs as well add some fresh solder to the resistors nearby the stk392-180.
I would suggest to check the solder joints again and also nearby the STKs area, check the low values resistors solder joints as well.
It looks like the ICs are overheating.
Did you apply enough thermal compound before installing the ICs?
Try placing a fan close enough to the ICs, just to see if overheating is an issue.