My Mitsubishi VS 50609 will randomly shut off while watching it. It could only be on for and hour or it can be on for several hours, it makes no difference. There is no pattern to it and you can not turn it back on until it's ready to turn back on. It just makes no sense to me. Can anyone help with this problem? Any ideas?
Make sure you have no colent leking on the bord these set many I worked on had colent leaks that cused it to shut down. does the set come back on when it's cool? could be a bad soder joint. allso there could be bad caps. deos it come back on if you unpluge the set for 5 sec and plug back in that resets the set.
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You have a bad ground on a convergence IC. You will have to carefully pull this board out and resolder the pins. If this does not solve the problem you will have to replace the ICs. I have saved a few of these TVs with just a resolder job. Thanks for asking!
Could be h.v. splitter.pull the lead coming from the flyback that enters into the h.v.splittter. Put lead in a quart jar and turn the set on and see if you hear a hissing sound, if you don't see a blue arch also. If set stays on then h.v.splitter is bad.
I gave this advice to someone with this same problem so here it is again:
It sounds like your shutdown circuit is being activated. This is due to excess current being drawn. This usually happens in the High Voltage section of the TV or one of the deflection stages. Due to the nature of this problem I would suggest that you take it to a local TV repair shop or have a TV repair person come out and take a look at the issue. The HV section is dangerous and should be dealt with by a qualified TV repair technician.
I believe that you are having HV voltage problems either with the SMPS or the HV Power supply. The shut down circuit is activating. This might be due to a component in the HV or SMPS section. I would suggest having a TV tech look at the set.