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Horizontal sweep absent, is the fault. Vertical sweep is OK. Check for any loose solder terminals or loose connection at the connection goes to deflection yoke. Check all the capacitors related to horizontal scan output. google.com/+GopakumarGopalan
While the set is on does the picture and sound come on well, If so the fault is relative to the output stages, look for components heating up, dry soldering due to this heat cutting off the connection.
However if there is no picture or sound then the fault is in the processor , a test on voltages on diffferent cicuits must be checked when the set shuts down. This will indicate the defficient voltage , possible in the power or output board.
that your unit has some sort ofPSU
fault, or a problem that is shutting down the Power Supply Unit, PSU. This
happens so that no further damage, and possible fire will occur. You
need to take the unit to a reputable service centre/man and ask for a firm
"Quote" for the work to be done. It is that
sound that gives it away, this is a typical switchmode Power Supply problem
hello... i will try to help you.this seems to be a power suply malfunction.make some measurements of the tension between groud and secondary tensions of the power suply(one or more of them could be lower),possible cause :one or more electrolytic capacitors damaged
The fault for all of your TVs' is stuck in standby which would point to a fault on the power supply most likely caused by a diode. If you can check this for yourself otherwise find a competant technician. Hope this helps.
If you know how to solder is a pice of cake,,,, but be carfull the tv store a high voltage in the picture tube and beliveme is a very dangerous one but if you decide to go on the vertical Ic is the one with 10 or more conection pin (in some model 7or 8) and is atach to a heat sinc (a pice of metal) to cool down the Ic solder all the pin and check to dont joint to pins with the solder dont applay to much heat or will spoil the IC allso check the power suply area for cold solther to thepower suply is the area were the ac cord is atach all around there....remember dont touch repeat DONT TOUCH the heavy red cable coneted to the picture tube and as techman say get some buddy beside you with a telephone redy to call 911......good luck and rate me