Question about Televison & Video
I have a 53" hitachi ultra vision rear projection high definition tv.I was watching it and then it turned off.I tried to turn the tv back on,but the power comes on,but i get no picture or sound.I took the lower back panel off and noticed two small green lights that were on.One of the green lights was flashing as the power light in front of the tv was flashing.The tv comes on,but no picture or sound.I am at a loss as to the reason why this has happened.
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Posted on Jan 02, 2017
the convergence IC`s and associated resistors have to be replaced, do not repeatedly push magic focus or the alignment after the parts change out will take longer which of course means higher repair bill, good luck
Posted on Nov 27, 2007
you will need to replace both convergence ICs they are STK392-110 you will also need six resistors (2) 2.2 ohm 1watt
(2) 1.5 ohm 1watt, (1) 3.3 ohm 1watt and (1) 1.8 ohm 1watt.
You can get replacemnet ICs and resistors at te following link with free instalation instructions. Here is the link.
Posted on Jul 17, 2008
Does the magic focus work on your set ?
If it doesn't you must replace the convergence Ic's with a kit that is available through your local parts distributor
You must replace all resistors in the kit
If you are not good at soldering and de- soldering have a local tv shop do it for you
Posted on Feb 08, 2009
If you are not experiencing any shift in colors, it sounds like the power supply is failing since this will affect all three colors.
Posted on Feb 28, 2009
SOURCE: tv won't come on
If the TV goes in standby, then it is in protection mode.
Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.
1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.
2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.
If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.
If you want to DIY you find parts here,
All: Appliance parts, electronics parts & more from PartStore.com
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LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |
On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem
On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.
On Rear Projection : check lamp, lamp ballast, power board, and convergence.
On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.
Posted on May 05, 2009
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