Question about Televison & Video
Hi Guys. I have a 32" hitachi LD30U tv which ive had for around 4 years. When i switch the TV on the screen distorts between a scrambled blue screen and a normal screen. Kind of flickering. After around 10 to 15 minutes this stops and the tv works fine and is fully functional. Not sure if it`s on the way out. I`m hoping there is a simple solution which i`m overlooking. Any help would be greatly appreciated. Tom
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Posted on Jan 02, 2017
SOURCE: hitachi 57f710s
Sounds like a video board problem. May also be the convergence board. You might get some freeze spray ( a component cooler that comes in a spray can ) and while the set is on, spray the boards and see if the problem temperarly corrects. This is to isolate the problem. Once the problem is isolated, you can change the bad component. Good Luck
Posted on Jan 06, 2008
You have a problem with the STK convergence modules. They're on the
center circuit board attached to an aluminum heat sink that's about 8"
long and 6" tall. You may be able to recreate the problem (hour glass
effect) by gently moving the heat sink (which the modules are connected
to). This gives the hour glass effect on the picture and the advanced
convergence screen. This is an indication that the modules pins aren't
solidly connected (meaning soldered) properly. Remove the circuit board
and clean the old solder off & resolder the modules pins to the
circuit board reconnected the board and then retest by again pushing on
the heat sink. The "factory" job was good enough for 3-4 years
but the heat (and these modules do create a lot of heat) and stress
created from repeated use eventually takes it's toll, weakens the pin
connections and our problem occurs. take the appropriate cautions
working around the high voltage of the set & use a non-conducting
piece of wood to push the heat sink when doing tests.
If soldering doesn't help, then the modules have died and need replacing. Don't buy the $10 cheap ones. Most of them have an upgraded version that is stronger. Also look for any burned resistors in the vicinity of the modules.
Best of luck, hope ya fix it.
Posted on Feb 15, 2008
try to pull the power plug for about a couple of minutes and after that turn it on. see also the settings of your tv and manual of it. if all suggestions here didnt fix your problem then you might send it to repair service. hope that helps!
Posted on Sep 30, 2008
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