My 10yr old 50SBX70B flickers and cuts out after a short ON period. Changing outlets turns the unit back on for short period then repeats pattern. Suspect power supply and told its repair could amount to $450. Would it be worth it? Its a great TV when workung.
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Re: Unit cuts out after short period.
Yes it could cost as much as $450.00.Your set Needs Both of the STKs replaced. Hope you can solder or get someone who can, STKs are convergence ics they also control power too! If you have in your set STK392-110s use the 180s 110s do not hold up They will be big black ICs
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Reset the lamp hour meter. Unplug the unit in the main power outlet then turn on the main power switch on. Press and hold the ON, stand by, menu and Input buttons at the same time the buttons are on the projector. Though the same buttons are found on the remote control, the reset only works with the projectors buttons.Plug the power cord back in to the outlet while holding the buttons ON, STANDBY, MENU, INPUTS buttons at the same time, the lamp timer will reset when the projector receive power. Good day and best regards.
If the green lites on bord lites up doesnt mean it is ok. If you check on that board in the middle at the back of the heatsink in the middle, there is two lights, green lights that is not lighting up. If i am wright. You have caps an a transistor on your powersup that is shorted. Take to somebody to fix powersupply.
Symptom: NO HOR SYNC
Cause: DEFECTIVE I008
Symptom: No Horizontal Sync. When PinP is called up, main picture may lock up for a 8 moment, then it goes back out of sync.
Cause: I008 defective (Sync Switch)
There are many reasons for a no start on your 50SBX70. I will give you the most common problem I have found. Check E994( 4a pico fuse on the 120v line in pwr supply) If it is bad, remove C701(.001/2kv) from the circuit located near Q777. Inspect the capacitor for any burn marks, if so put in a new fuse and leave the cap out and fire up the set.
i also have the same problem with the flashing green light for a while then a different red light starts blinking on and off around 5 times....and i replaced my burnt bulb with a new one...still no picture.