"b" wrote in message
ups.com...
| On 3 ago, 01:29, "Beemer" wrote:
| My Sony CRT TV Model KV-M1420U has developed a problem. After 15
minutes
| of perfect picture, the picture fades out by going through a colour
change
| to purple then totally black. All channels are affected.
| Beemer
|
| this sounds like a dry joint - probably in the heater line- first
| check the little board attached to the CRT.
| Sonys especially tend to develop lots of dry joints, so you'd be well
| advised to take out the main board and inspect underneath,
| resoldering anything suspicious. You may even avoid expensive problems
| ocurring if you're careful.
|
| -B
|
|
B,

If it is a dry joint I assume that it is expansion which results in the
failure. Would using a cold spray be appropriate to try to isolate the
failing component? I would normally only use a spray on on an
semiconductor.

Beemer