I have a large flat screen Toshiba, about six or seven years old. It just
goes off by itself while I'm watching it. I need to dig for the
instructions, and see maybe if there is a sleep timer set on it for turning
it off for inactivity. Lately, I notice that it goes off sooner.

It is one of the three bulb rear projection screen models. Last time, I
heard that dust in the unit could cause overheating, so tomorrow, I will
take the covers off and blow it out with compressed air.

Is this a common thing with you Toshiba owners? Does it indicate
overheating because of dust, or maybe it needs new bulbs? I'll dig for the
instructions tomorrow, but would appreciate any input you might have in the
meantime.

Steve

On Tue, 21 Aug 2012 20:28:40 -0700, "Steve B"
wrote:

I have a large flat screen Toshiba, about six or seven years old. It just
goes off by itself while I'm watching it. I need to dig for the
instructions, and see maybe if there is a sleep timer set on it for turning
it off for inactivity. Lately, I notice that it goes off sooner.

It is one of the three bulb rear projection screen models. Last time, I
heard that dust in the unit could cause overheating, so tomorrow, I will
take the covers off and blow it out with compressed air.

Is this a common thing with you Toshiba owners? Does it indicate
overheating because of dust, or maybe it needs new bulbs? I'll dig for the
instructions tomorrow, but would appreciate any input you might have in the
meantime.

Steve


It may very well be a component overheating. I've had similar problems
with other TVs.

Chances are, the cost of repair is going to be half the cost of a new
TV, a real LED flat screen with a much better quality picture.

I know two people with those old projector TVs and both upgraded when
the heard the cost of repairs.

On Aug 21, 11:28*pm, "Steve B" wrote:
I have a large flat screen Toshiba, about six or seven years old. *It just
goes off by itself while I'm watching it. *I need to dig for the
instructions, and see maybe if there is a sleep timer set on it for turning
it off for inactivity. *Lately, I notice that it goes off sooner.

It is one of the three bulb rear projection screen models. *Last time, I
heard that dust in the unit could cause overheating, so tomorrow, I will
take the covers off and blow it out with compressed air.

Is this a common thing with you Toshiba owners? *Does it indicate
overheating because of dust, or maybe it needs new bulbs? *I'll dig for the
instructions tomorrow, but would appreciate any input you might have in the
meantime.

Steve

Try avsforum.com. There are dedicated threads for Toshiba owners. If
you do a search there you might find your answer.

Steve B wrote:

I have a large flat screen Toshiba, about six or seven years old.
It just goes off by itself while I'm watching it.

There are bad electrolytic capacitors inside your TV.

http://www.bridgat.com/files/offer_A..._Capacitor.jpg

A capacitor plant in China made a lot of bad capacitors about 7 years
ago. MANY consumer electronic devices (TV's, computer motherboards,
Digital TV convertor boxes, etc) have stopped working because these
capacitors failed.

It's fairly easy to repair the problem - just unsolder the caps from the
circuit board and replace with a new cap. You can buy new caps for less
then $1 each. Your TV probably has only 4 to 6 of these that have gone
bad - probably in the power supply circuit.

Look at the top of these caps for cracks or a split where a tan-colored
pasty substance has oozed out. Sometimes there will be nothing oozing
out, but the top of the capacitor will have a slight upwards buldge.

TV Repairman wrote:
Steve B wrote:

I have a large flat screen Toshiba, about six or seven years old.
It just goes off by itself while I'm watching it.

There are bad electrolytic capacitors inside your TV.

http://www.bridgat.com/files/offer_A..._Capacitor.jpg

A capacitor plant in China made a lot of bad capacitors about 7 years
ago. MANY consumer electronic devices (TV's, computer motherboards,
Digital TV convertor boxes, etc) have stopped working because these
capacitors failed.

It's fairly easy to repair the problem - just unsolder the caps from the
circuit board and replace with a new cap. You can buy new caps for less
then $1 each. Your TV probably has only 4 to 6 of these that have gone
bad - probably in the power supply circuit.

Look at the top of these caps for cracks or a split where a tan-colored
pasty substance has oozed out. Sometimes there will be nothing oozing
out, but the top of the capacitor will have a slight upwards buldge.

Hi,
Likewise, I just fixed kid's 21" LCD monitor by replacing 4 caps in
power supply circuit. Symptom was it turns on and goes off in few
minutes over and over. Cost was just time spent. I had some caps in my
hell box. Other than working voltag, cap. value does not have to be
exact match.

On Wed, 22 Aug 2012 09:05:08 -0600, Tony Hwang wrote:
Hi,
Likewise, I just fixed kid's 21" LCD monitor by replacing 4 caps in
power supply circuit. Symptom was it turns on and goes off in few
minutes over and over. Cost was just time spent. I had some caps in my
hell box. Other than working voltag, cap. value does not have to be
exact match.

Well, too low and you'll start to see problems as the PSU won't be
outputting nice clean DC, and if the replacement caps aren't rated for
the same temperature band then they might cook themselves pretty quickly.
The ones that seem prone to 'capacitor plague' are often low-ESR types,
too.

cheers

Jules

"Steve B" wrote in message
...
I have a large flat screen Toshiba, about six or seven years old. It just
goes off by itself while I'm watching it. I need to dig for the
instructions, and see maybe if there is a sleep timer set on it for turning
it off for inactivity. Lately, I notice that it goes off sooner.

It is one of the three bulb rear projection screen models. Last time, I
heard that dust in the unit could cause overheating, so tomorrow, I will
take the covers off and blow it out with compressed air.

Is this a common thing with you Toshiba owners? Does it indicate
overheating because of dust, or maybe it needs new bulbs? I'll dig for
the instructions tomorrow, but would appreciate any input you might have
in the meantime.

Steve


Samsung, sorry. Symptoms the same.

On 8/22/2012 10:46 AM, Steve B wrote:
"Steve B" wrote in message
...
I have a large flat screen Toshiba, about six or seven years old. It just
goes off by itself while I'm watching it. I need to dig for the
instructions, and see maybe if there is a sleep timer set on it for turning
it off for inactivity. Lately, I notice that it goes off sooner.

It is one of the three bulb rear projection screen models. Last time, I
heard that dust in the unit could cause overheating, so tomorrow, I will
take the covers off and blow it out with compressed air.

Is this a common thing with you Toshiba owners? Does it indicate
overheating because of dust, or maybe it needs new bulbs? I'll dig for
the instructions tomorrow, but would appreciate any input you might have
in the meantime.

Steve


Samsung, sorry. Symptoms the same.



it's not the bulbs. if one of them were going, you'd lose colors in the
image. it also wouldn't come back to a normal picture.

"chaniarts" wrote

it's not the bulbs. if one of them were going, you'd lose colors in the
image. it also wouldn't come back to a normal picture.

It had done this before, and I removed cover panels and blew with compressed
air. Now, I run a fan on it, and that seems to help. Will blow it out
today, and possibly postpone the inevitable.

Steve