Question about Toshiba 50HX70 50" Rear Projection Television
I bought 50" Toshiba projection TV 4 years ago. The TV has problem "having sound but no picture" for 4 times. In the past, the issue is fixed by replacing a Fuse and the transistor D2553. Recently the TV had the problem again, I replaced the Fuse and D2553, but TV still no picture. What I need do after replace the D2553? How to fix it?
Not picture , not sound
Posted on Apr 05, 2009
You've got a bad solder conetion,or broken foil line,s on the pcb (printed circuit board).Narrow it down by pressing in different places,or use plastic or rubber tip.If not,then you got a shorted load on this fuse and diode.do you have a schematic,whats at the end's of this circuit.D represents a
Posted on Jan 30, 2007
Why is this being discussed at all under a SONY projection TV topic?
Posted on Nov 12, 2006
Question#1: Need model # and board location #(eg. F302, Q501). D2553 sounds like a HV switching transistor (2SD2553) or Horizontal Output. If it's gone 4 times, there's something causing it. Most likely is bad connection, but without all the information, that's a wild stab. Question#2: Sounds like bad solder connection. Check bottom side of board for cracks on soldered connections. Start checking large devices (transformers, HV Switching Transistors) and devices mounted on heatsinks first. Remove all old solder and clean w/ alcohol before resoldering. Will require patience and soldering skills!!
Posted on Oct 23, 2006
I suggest calling a new service center to repair this. Just because the transistor repaired this the first few times, does not necessarily mean that is the problem this time. It is also possible the technician used a cheap knock off part for this transistor. Tell the new service center you want them to use original parts.
Posted on Oct 08, 2006
HI I HAVE THE SOUND BUT NO PICTURE BAT WHEN I BEND THE POWER BOARD OR PLAY WITH IT LEFT OR RIGHT THSN I GET THE PICTURE
Posted on Oct 06, 2006
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Posted on Jan 02, 2017
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