Hello, 3T39! You wrote to Mike on Tue, 12 Jul 2005 14:10:36 +0100:
M>> I was about to contact a repair shop, when I managed to find the M>> vertical section on the motherboard.
M>> I gave it a clean with a cotton bud, as it was thick with dust. The M>> tv's over 20 years old.
M>> Anyhow, it seems to be working now...!
M>> It was mentioned above about spraying component cooler on the M>> components after the TV has started to work which may help in finding a M>> bad semiconductor. T> Out of curiosity, what is this component cooler? Is it something like T> WD40? Or something completely different?
T> It's possible that your probing with a cotton bud has moved the faulty T> joint and caused it to connect a little better, but I'm in no doubt It's T> still there. I say joint, because reading your posts, I think on balance T> it's a little more likely to be a bad, thermal sensitive, joint than a T> faulty component. But of course I could be wrong here. It's the solder T> side of this mainboard around the vertical oscillator that you need the T> magnifier, reflow any bad or cracked joints. Concentrate on the items T> that use most power ( big stuff, and anything fastened to a lump of T> aluminum) as these will fail first. The cooler mentioned earlier is T> basically a chemical with a very rapid evaporation rate in a spray can, T> so when a component is sprayed the evaporation carries away huge chunks T> of heat.
Meant to mention as well, there four coloured, fairly heavy wires going to the scan coils which plug into a socket on the mainboard. check the joints of the socket
With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com