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140 posts

Master Geek


Topic # 114116 8-Feb-2013 19:44 Send private message

Above TV was an insurance replacement approx 3 years ago for their 70" SXRD that went on the blink. The good folks on this forum gave me some great advice and replacement has been excellent - until now..

In oct last year it started powering off and immediately back on - all within 2 to 3 seconds. Relay clicked, illuminated 'Sony' logo on front went dark then it kicked back on again. Incidentally, it started doing this about 2 weeks after I hung it on the wall. It was floorstanding prior.

Completely random resets, no flashing power lights indicating something is wrong, nothing recorded in the service menus as not working etc so checked all cables and good lady thought the power cable was loose (ish) and claimed to pushed it in a bit further.  All seemed fixed.  Kind of laughing at the power cable being the culprit or so I thought

Two weeks ago it started again.... ARGHhhhhh!!  Service and Diagnostic menu still says nothing wrong.


Its a bit hard to get the hand up the back of the telly to check the power cable is pushed in all the way but I had a shot and am pretty sure it's pushed in as far as it will go. The plug pushes in sideways into a hole along back of the TV set and  does have some play - front to back (as you face the screen) . Not sure if it was like that previously but when wiggled etc no issues, crackling or power related buzz of any kind. 

Any clues prior to me calling out a service tech if it starts to get worse. My experience is $$$$ with these sets on repairs. It might just need to fall over and get smashed, giving me an excuse to buy a new one.

1) Any clues as to what is causing it - some things I could try?  We watch SKY HDI about 95% of the time so always happens on that input.

2) What is a comparable set. Appreciate tech has moved on in last 3 years.

Thanks for any advice



Ged

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7 posts

Wannabe Geek


  Reply # 758800 9-Feb-2013 21:30 Send private message

Yeah, happens to us occassionally, too.  It's a different model (KDL40EX700) but similar sort of behaviour.

6872 posts

Uber Geek
+1 received by user: 320


  Reply # 758807 9-Feb-2013 21:43 Send private message

Have you upgraded to the latest firmware?



140 posts

Master Geek


  Reply # 758824 9-Feb-2013 22:45 Send private message

Nope to the firmware. Didn't even realise I could !

Will go do a search. I presume it will be loaded onto a stick and updated via plugging it into the telly.

6872 posts

Uber Geek
+1 received by user: 320


  Reply # 758828 9-Feb-2013 23:17 Send private message

gedc: Nope to the firmware. Didn't even realise I could !

Will go do a search. I presume it will be loaded onto a stick and updated via plugging it into the telly.


You should be able to do it via an ethernet cable.

677 posts

Ultimate Geek
+1 received by user: 13


  Reply # 759082 10-Feb-2013 17:43 Send private message

Usually these powering off and on problems are caused by a faulty power board. Wall mounting the television could've increased the internal temperature.

724 posts

Ultimate Geek
+1 received by user: 51


  Reply # 759110 10-Feb-2013 18:39 Send private message

time to ring sony service.

shame as the 55x45500 was the first lcd to seriously challenge a good plasma for picture quality and one of the best sonys in a long time.

does sony even use localised led dimming any more ?



140 posts

Master Geek


  Reply # 759191 10-Feb-2013 21:01 Send private message

Given the price of new sets I'm seriously considering a new telly if this one eventually drops dead. Will wait till the harvey norman's 50 months interest free dooby then go and haggle as normal.

I see sharp have some new 60 and 70 inchers out there..

Any good recommendations.  I would be looking at the 55" as minimum size. 

Watch a variety of telly - normal sky channels and sport.

TV is fed via blu ray, PS3, MYSky HD

Cheers



Ged

677 posts

Ultimate Geek
+1 received by user: 13


  Reply # 760338 12-Feb-2013 19:50 Send private message

Most power board problems are caused by failing capacitors. For somebody who knows what they're doing they're very cheap to replace. Even a whole new power board isn't always expensive.

All Sharp LCDs currently in NZ smaller than 70" are only edge backlit. The 70" model is obscenely expensive. I can't see the value in spending $6,000 on a TV and an LCD at that. But I don't know what their 2013 models will be like.

I think most people who buy super sized TVs don't notice any aspect of picture quality other than size. Because although something like Avatar may look good at any size, the further beyond 55" you go the more you're pushing beyond the optimal size of normal source material which has defects like poor resolution or grain and compression artefacts.

If you really want a premium TV I'd suggest the Panasonic ZT60 if it's released here. But don't buy a plasma if you want to display static material for long periods of time.



140 posts

Master Geek


  Reply # 802516 19-Apr-2013 20:39 Send private message

Bumped this thread as i appear to have found out what is causing the reboots in case anyone else has a similar issue -the digital signal from the rooftop aerial or the board inside the telly trying to process it. Took telly off wall, checked all connections etc, rehung and left the aerial out as i use sky hdi only. TV was fine for a week then i plugged aerial in as it was hanging loose. Previously i had all digital channels through the built in freeview box but now it couldnt find sny digital channels and i had to rescan. Replugged the aerial and it found 5 but kept dropping in and out and picture froze, pixxelsted etc.

Then 'click...click' - tv reboots.. Too coincidental.. Pulled aerial again..all good for 2 weeks. Put back in and within 20 minutes 'click...click' reset....

I did chop into aerial lead and put in a new wallplate when i hung tv onto wall so may have made a mistake there or its the processing board in the tv.. Not too bothered about getting this fixed as its now not an issue but any ideas if a dodgy signal would cause the tv to reboot otr is it most likely some electronic circuitry?

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