When I turn on the tv, the power light comes (you can hear normal click sound), then immediately following it, nothing - no picture.
Before this occured a day before, I was watching tv, the screen blinked, then a few seconds later, it went off. Turned off the tv, waited a few minutes, turned it back on and everything was fine. Did it again, repeated the steps. Now, nothing, just the power light comes and nothing, however, if I do press the channel button up, I can hear sound but no picture, but when I put it back on the channel 3, because I have a dish, no sound or picture. Any suggestions...
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Since the set appears to "recover", it suggests either a poor solder connection or bad cap somewhere in the power supply. The 7 blinks indicate the problem circuit is in the horizontal area. Check the regulator (STRxxxx) IC in the power supply. If you do not have experience working with TVs, please refer this repair to a shop. The regulator IC costs around $25.
The real deal here is the protection circuit has activated. This is
caused whenever an excessive amount of current is being drawn from the
main power supply. Upon detection of same, it immediately takes over
the power management of the set and shuts it down. The clicking sound
you hear is the ON relay turning on the set, but immediately the power
mangement system shuts it OFF. You should hear two clicks, but they
may be so close together that it sounds like one click.
This set is getting rather ancient and I would not recommend you spend
much money on it for this reason: It is highly likely that once the
set if repaired that another failure would occur. This is because of
the law of averages; the first failure is often followed by another
failure from anywhere within the set.
How good is your picture when it did come ? Is it as good as it once was ? Or is it alittle washed out. If it is washed out the picture tube is weak . Sometimes turning up the screen control alittle would solve problem but if you turn it up too much you would have faint white line running diagonally. Now if you think the picture was good before you this problem video circuit would be your suspect . Jungle IC or something in the RGB circuits . Good luck
This could have started as a loose solder connection or a capacitor going bad inside the set. By now you probably have a shorted transistor and maybe a defective power IC as well. At this time of year when there are bargains to be had for new TV's, I would just replace it as the repair would likely be over $100.