New TV won't turn on when scart cable next to mains - Weird?

podwin · Aug 21, 2012

Hi,

I joined to ask a question about something else, but thought I'd mention this first as its weird, and demonstrates cheap electronics. I wonder if anyone on here has come across this before?

A new TV, probably one of the cheapest makes on the market, wouldn't turn on, so I took the scart cable out which sorted the problem.

I found out, if a scart cable is plugged into the TV, with nothing on the other end but the cable is near some mains wiring, the TV refuses to turn on.

Is this probably due to bad/cheap design, or a fault?

Regards,

Martin

steptoe · Aug 21, 2012

never heard of that before,

what do you mean not turning on?

not coming out of standby, or just no picture?

if its no picture/blank screen but the LED is showing ok Id guess there is enough inductance in the scart lead to fool the TV into thinking it has a SCART feed but obviously there is no picture to show, hence a blank screen

podwin · Aug 22, 2012

Hi,

Sorry I'll clarify what I mean, the TV is in standby, press the ON button on the remote, the standby light goes off, and you wait, the LCD screen never lights, after about 15 seconds the standby light comes back on.

With the scart cable away from this mains wiring and the ON button is pressed to take the TV out of standby, the standby light goes off, and you wait, then the LCD screen does light but there is still a blank screen for about 2-3 seconds then the picture comes on.

It is interesting that the TV comes on with the source set to EXT, i.e. the scart feed, if there is a plug in the scart socket, but if as I've said the scart cable is next to this wiring the TV reverts back to standby.

The wiring in question is mains twin and earth wiring for kitchen cabinet lighting (it's a kitchen TV).

steptoe · Aug 22, 2012

Yep, deffo sounds like the scart is picking up an inductance, then when the tv realises there is no picture it goes to sleep (turns off automatically),.

---------- Post Auto-Merged at 13:36 ---------- Previous post was made at 13:33 ----------

When you turn the tv on with the scart connected you should still be able to select a different input, as long as you do something within the first 15seconds it should be ok, there may also be a setting to change the time-out before it goes to sleep.

SLIPSHOD & SLAPDASH · Aug 22, 2012

podwin, are you & the Tv in the UK, Canada or America ?

podwin · Aug 22, 2012

Yep, deffo sounds like the scart is picking up an inductance, then when the tv realises there is no picture it goes to sleep (turns off automatically),.---------- Post Auto-Merged at 13:36 ---------- Previous post was made at 13:33 ----------

When you turn the tv on with the scart connected you should still be able to select a different input, as long as you do something within the first 15seconds it should be ok, there may also be a setting to change the time-out before it goes to sleep.

I see, that makes sense, thanks!

---------- Post Auto-Merged at 14:54 ---------- Previous post was made at 14:54 ----------