My tv switches itself to standby 4or 5 seconds after i switch it on, tv is 2 yrs old

Measure B+ on the set , If normal check G2 voltage


G2 adjustment is on the Flyback Transformer

That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

I managed to find a local repair man who fixed the problem. He put in a new transformer.

Is the remote in the room and pointed at the tv when this happens? If it is try fresh batteries in the remote.

There's an option on the menu to tuen 'demo mode' on and off. If it's set to on, that's your problem. It will be switching input sources every 2 minutes or so. Switch this off and it'll be ok again.

Dead, led flashing red/green at first, then going to red standby
Replace C604 (1000uF, 16v) elec. cap. It is in the decoupling circuit for the 5 volt supply
Reverts to standby from switch on via TV or Video
No 5v rail because FET MTP3055 o/c. (BUZ71 will do nicely)
Goes straight to standby, after a quick burst of power
Replaced R952 (39K), had gone slightly high

have you tried changing the batteries just to elimate this problem

change them

sometimes if the batteries are low in electronic devies, they send a wek signal to its receiver (your tv),

your tv gets confused and then switches itself to standby

if you have changed the batteries and this problem still persists

it can only then be th PSU or power supply unit, take it to your local tv repair shop of mastercare somewhere like that, its going to be cheaper to get it repaired than replacing the whole tv

PSU'S generally 20 to 50 pounds depending on model

don't deo it yourself though unless you've got a capacitor discharger (or a nice 25KV will be on its way to your body)

hop this helps mate, let me know how you get on

Is this a recognised symptom? yes the problem in power supply. it is due to switching oscillator& switcing output circuit probabaly capacitor & transistor. as set is very old so after power supply is ok check for horizontal output also. can it be fixed? yes it is common & not major problem

1 it might be due to loose contact in plug or socket. 2 there might problem in power supply section in your tv.

Right i had this same problem for ages! i cannot explain why but when i uplugged my DVD player (which was flashing its light at the same time as the tv for some reason) the TV has worked fine.