[mbrown]

My two ancient Sony Trinitron CRTs have both 'died' within a couple of weeks of each other and the only connection between the two events appears to be that they were hooked up to the same Nokia Mediamaster 221T at the time. My Sony KV29F2U lasted the longest, I watched probably about 30-40 hours of broadcast received by my Nokia box, spread over 2 months (I don't watch a lot of Freeview) before it gave up the ghost. Now when I switch the TV on I get one or more horizontal white or coloured lines in the middle of the screen which then disappear leaving a blank screen, and then the TV goes into some kind of error state indicated by one of the two red 'standby' bulbs flashing.
As there was no obvious connection between the TV dying and the Nokia digibox I connected the digibox to my other Sony Trinition, a KVX2572U. This lasted all of about 10 mins of displaying the signal from the Nokia box and now shows the same symptoms as the KV29F2U; single horizontal line at warm up before blank display and flashing 'standby' light.
I'm guessing both tvs have had it, but has anyone come across this before or have a miracle cure?! I guess I was lucky to get such a long life out of each CRT but I'm still annoyed, especially considering the Nokia digibox was a 'hand-me-down' from some relative.
Thanks,
Martin

[Andy98765]

I would doubt very much if the Nokia digiboxes did the damage, all it sends is a video and audio signal, maybe time for a nice new large scareen TV with "Built-in" Freeview.

[JayCee]

Originally Posted by mbrown

This lasted all of about 10 mins of displaying the signal from the Nokia box and now shows the same symptoms as the KV29F2U; single horizontal line at warm up before blank display and flashing 'standby' light.
I'm guessing both tvs have had it

Your sets are suffering from a very common occurence in Sony models of that vintage and the Nokia box is blameless...pure coincidence.
The symptoms are of a frame collapse and in both models can be caused by dry joints on...or failure of...the frame output IC.
You need to call on the services of a TV repairman and ask for a quote.

[mbrown]

Thanks for the replies.
Maybe it was pure coincidence but neither telly had shown any such problems before, and the second one lasted all of 5-10mins once I'd changed the input to the Nokia box, and having been fine for an hour or two before that. BTW I noticed that the picture from Nokia box was enlarged if that makes sense (compared to the picture from the internal analogue tuner) in that the picture would fill a larger screen. I thought that might mean the signals to the deflection coils were too strong (I'm not au-fait with CRT workings!) and so blamed the Nokia.
Anyways, thanks for the advice, I'll get some repair quotes.
Martin

[Koala]

Almost 100% sure its not related to the Nokia box. As the previous guy said it will be dry joints on the field output chip "common fault" if it hasn't blown the chip then its just a case of a bit of soldering. Even replacing the chip isn't a big job.
One would assume you moved the second TV in order to put it in the place of the broken one, that movement may have been just enough to crack the last bit of solder on the chip that was just hanging on for dear life!!
My 11 year old Sony suffered this same fault twice in its lifetime.