Sharp TV Repair: Grey Screen with White Horizontal lines

Several different circuit areas could cause the symptom you described. Provide a little more troubleshooting information for a more specific suggestion.

Could be a problem in the G1 or G2 voltage to the crt, loss of the video output main b+, a short in the crt, a problem in the video output stage, corrupted eeprom data for the crt alignments, and possibly a few other more remote areas.

The only way to know exactly what it needs to be repaired is to have the tv properly diagnosed by a qualified technician.

The most common cause of this problem is an open resistor. Could also be a bad FBT, CRT, or a few dozen other things. Start by looking at the bias on the CRT and the G2 voltage.

Leonard

Thanks for the info.

One thing I meant to add is the OSD works fine. Does this help narrow it down? Also, does anyone know where to get schematics for this TV?

hi am having similar problem with my AWA model w571 tv only I get a blue screen with the white lines. it's been looked at twice in the last week and still problem persists. I've tried reading the repair warranty and there are references to

1 - trace features to picture tube and tube socket 2 - dislodging foreign material 3- heaters to cathode short circuit on blue gun 4 repair tube socket on **** circuit board 5 - replace heater dropping resistor & check of plater (??) circuit.

Anyone have any info on why problem persists? it worked fine both times repairedat the workshop but when returned after 4 days the first time problem returned and within and hour of it being returned the second time.

john