Archived from groups: alt.comp.hardware.pc-homebuilt (
More info?)
Al Smith wrote:
>>> Argggh! You should have left it at least a couple of days -- even
>>>
>>>> a week. You screwed yourself. Recently, my brother gave me an old
>>>> television that had been sitting in his basement. I tried it out,
>>>> and it worked perfectly, but made some strange tinkling noises. Next
>>>> time I turned it on ... nothing. I figured out that it had become
>>>> damp sitting in the basement, and I hadn't let it dry out. Scratch
>>>> one television. Or on your case, one monitor.
>>
>>
>>
>>
>> How old? If more than a decade or so, the electrolytic or paper
>> capacitors are suspect. I restore old radio and electronic gear and
>> the first thing I do with anything more than 15-20 years old is recap
>> the set.
>
>
> This was a 20" Toshiba TV designed for use in hotel rooms. It had a
> special channel tuner built into the front of it, but worked fine as a
> regular television when set up properly. My sister-in-law got a deal on
> a batch the Holiday Inn (or whatever) was selling, so she bought five of
> them.
>
> After the one my brother gave me refused to work, he gave me another
> identical set that is working in my bedroom right now. It also has a few
> quirks. Sometimes the sound disappears for no reason at all, but by
> fiddling with the volume knob, I've always been able to get it to come
> back.
Very likely dirt/grime in the volume pot and some spray contact cleaner
might clear it up. Few squirts, rotate the pot back and forth, repeat till
clean throughout the volume range.
Or the wires to it could be loose.
> Sometimes, the set makes the most ungodly electrical *snap* you
> ever heard. Like a whip crack. Strangely enough, it doesn't do anything
> except momentarily make the picture flicker.
Not so strange. That's a high voltage arc: no wonder the picture flickers.
Again, very possible that that's caused by dirt/grime buildup on the high
voltage wiring/components (dirt/grime is not an 'insulator' at those
voltage levels). It's also possible one of the wires has shifted, or has
cracked insulation, letting it arc to something adjacent. It would be a
good idea to leave it unplugged over-night, then take the case off, and
clean the insides out (NO WATER). Also look for char marks from the spark
hits and see if adjusting the char indicated high voltage wire to a more
isolated position would help (do NOT 'attach' it to, or near, anything
metal, or the tube, or circuits).
> At first when I heard it, I thought the set was going to catch on fire
> or blow up ... but gradually, I've gotten used to it. It only happens
> every other day when I'm playing the television. In other respects, the
> Toshiba has a remarkably good picture and sound. Much better than the
> 30-year old 14" Sharp set it replaced (which is still working). The
> Sharp is so old, the phosphore on the screen has almost refused to glow
> -- takes ten minutes before I can see the picture well, even at full
> brightness.
Facebook
Twitter
Instagram