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Hello...The last three days I have had problems with tv not turning on. After I fooled around with it a while it would come on. Now the red (stand by) light in front and below the screen is blinking, and I can't turn it on. Please advise me.
The standby light should be blinking in a repeated pattern. Please count the blinks and report that number here. That will tell us the circuit that has the problem and allow us to provide possible solutions.
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Have a shop look at it, there is a power relay that either is causing this or something right around it is, seen this about five times over the last ten years in Hitachi sets. I had one customer who had it connected to a wall switch and from time to time had to unpower it several times but once on it was fine.....
If the red light won't come on it is not getting power.First,try plugging it in to a different outlet,or unplug one of the gadgets you know is working and plug the tv in there.You are simply switching.If you know that there is power coming from the outlet and it still won't come on then you'll have to check the cord;don't go much farther than that without expert help.
3 blinks indicates lamp door is not on or has not been reinstalled properly. This also could mean the lamp door switch has failed itself. Try removing the lamp door and putting back on, if that doesnt correct the problem then I recommend having the switch replaced.
The most common reasons for power issues are the battery, power jack and power adapter/cord.
Power off and remove the battery. If the laptop powers on with just the adapter connected, your battery is faulty.
If you move/wiggle the power adapter at the point where it connects to the laptop, and the power goes off and on, the power jack is the problem.
The power jack is inside the laptop and either needs soldering or replacement. If a power jack problem, it should be addressed by someone knowledgeable.
If no change, the power adapter is probably faulty and needs replacement.
This could be caused by a bad HV block. I would not take on replacing unless you know your way around HV circuits on Projection TV's. I would call a repair facility to give you a estimate to repair.
Most probably the IC504 (Sharp PQ05RD21) on A-Board went bad. This
model TV, including mine, is notorious for having this problem. The IC
is rather easy to find and inexpensive (around $2.50). Your main
problem will be desoldering the old one and soldering the new one.
I am by no means an expert but i have the same type of TV and have a similiar problem, first I thought it might be a heat-induced effect so I vacuumed the interior but no joy--then I carefully inspected the main board and found two components that looked melted. So I would suggest you vaccum the interior and then inspect. But be careful as I found one capacitor on the board that still had a charge after 3 days of the set being turned off, you might want to verify things with a multimeter before poking around.
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