Mitsubishi Television...Can't Turn It On Reliablely

[Too_Many_Tools]

I have a 27" Mitsubishi television from the mid 90's that will not turn
on reliablely.

One must turn it on dozens of times before it will stay on.

I have noticed that it is used often, the problem goes away while if it
is not used for weeks the problem becomes more severe.

I have checked the archives and it does sound like the known capacitor
problem with Mitsubishi sets of the 90's raising its ugly head.

While the set is a very nice set which works great after getting it
turned on and it does have sentimental value, I seriously doubt that it
is worth going through if one needs to replace hundreds of caps.

The main question I have for the group is does anyone know why the set
refuses to turn on? Does anyone know the failure mode that is going on?
Is this a common symptom? My sister had a similar set of comparable age
with the same problem.

Thanks for any advice.

TMT

 

[James Sweet]

I have a 27" Mitsubishi television from the mid 90's that will not turn
on reliablely.

One must turn it on dozens of times before it will stay on.

I have noticed that it is used often, the problem goes away while if it
is not used for weeks the problem becomes more severe.

I have checked the archives and it does sound like the known capacitor
problem with Mitsubishi sets of the 90's raising its ugly head.

While the set is a very nice set which works great after getting it
turned on and it does have sentimental value, I seriously doubt that it
is worth going through if one needs to replace hundreds of caps.

The main question I have for the group is does anyone know why the set
refuses to turn on? Does anyone know the failure mode that is going on?
Is this a common symptom? My sister had a similar set of comparable age
with the same problem.

Thanks for any advice.

TMT

You shouldn't have to replace hundreds of caps, the Mits cap issue is the
PiP board and is a couple dozen caps, that board can be removed and bypassed
if you don't use that feature. The power issue is probably a capacitor in
the power supply or a cold solder joint, the repair should be fairly simple
and straightforward, I do suggest you stop using the set until it's fixed
though, those quick power cycles are hard on it.

 

[Too_Many_Tools]

Thanks for the response.

It does have PIP but I have never used it.

Considering that the set has never shown the symptom before and is very
seldom used, I suspect it is a capacitor problem.

Thanks for pointing out the abuse that the quick power cycles are
doing...I will not cycle it again.

I really hate to just toss the set since the television is still a
quality set. When I compare it to the current offerings, one can easily
see the quality differences that have been made in the market.

Where would you suggest one go to get the schematic for this set? Is
SAMS still around?

TMT