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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Magnavox projection TV problem
I've got a Magnavox 55" projection TV that recently stopped working.
The first hint of a problem came while watching it last Tuesday. First the picture only took up half the vertical height and it had kind of a fisheye look to it. Then, after a short while, it would return to normal. Shortly after that, it lost color and was all black & white. At various times, the screen would also just go black for a split second before returning to normal. I turned the TV off and, a couple hours later, I turned it back on and everything seemed to work fine for about 3 hours. Then it totally shut off and would not do anything. The green light on the front came on and you could hear it power up, but there was no picture and no sound. I decided to take the back cover off and look around to see if I could see anything obviously wrong. There was a lot of dust in there, so I used a can of spray air to get it off the components. I couldn't see anything that looked out of the ordinary to me, so I put the cover back on. When I hit power after that, it worked fine. It continued to work fine for about 4 days, so I thought everything was OK. Then on Saturday I left the house and left the TV on. When I came back, the TV was off and I was back to the power up but no sound or picture problem again. I took the back cover off again and I saw that one of the circuit boards on the bottom had a small bit (about a teaspoon) of oil on it with some black residue in it. So that's my story. Does anybody know what kind of a situation I've got on my hands? This TV is only 3 years old. I'm about to take it to a repair shop, but I wanted to see if anybody had an idea of what was wrong before I did that so I can have an idea of what kind of repair bill I'm looking at. Jeff Haff |
#2
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Magnavox projection TV problem
Sounds like you have a coolant leak. To prevent further damage, stop using
the set immidiately. Most shops give free estimates. Dan "Jeff Haff" wrote in message om... I've got a Magnavox 55" projection TV that recently stopped working. The first hint of a problem came while watching it last Tuesday. First the picture only took up half the vertical height and it had kind of a fisheye look to it. Then, after a short while, it would return to normal. Shortly after that, it lost color and was all black & white. At various times, the screen would also just go black for a split second before returning to normal. I turned the TV off and, a couple hours later, I turned it back on and everything seemed to work fine for about 3 hours. Then it totally shut off and would not do anything. The green light on the front came on and you could hear it power up, but there was no picture and no sound. I decided to take the back cover off and look around to see if I could see anything obviously wrong. There was a lot of dust in there, so I used a can of spray air to get it off the components. I couldn't see anything that looked out of the ordinary to me, so I put the cover back on. When I hit power after that, it worked fine. It continued to work fine for about 4 days, so I thought everything was OK. Then on Saturday I left the house and left the TV on. When I came back, the TV was off and I was back to the power up but no sound or picture problem again. I took the back cover off again and I saw that one of the circuit boards on the bottom had a small bit (about a teaspoon) of oil on it with some black residue in it. So that's my story. Does anybody know what kind of a situation I've got on my hands? This TV is only 3 years old. I'm about to take it to a repair shop, but I wanted to see if anybody had an idea of what was wrong before I did that so I can have an idea of what kind of repair bill I'm looking at. Jeff Haff |
#3
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Magnavox projection TV problem
Sounds like you have a coolant leak. To prevent further damage, stop using
the set immidiately. Most shops give free estimates. Dan "Jeff Haff" wrote in message om... I've got a Magnavox 55" projection TV that recently stopped working. The first hint of a problem came while watching it last Tuesday. First the picture only took up half the vertical height and it had kind of a fisheye look to it. Then, after a short while, it would return to normal. Shortly after that, it lost color and was all black & white. At various times, the screen would also just go black for a split second before returning to normal. I turned the TV off and, a couple hours later, I turned it back on and everything seemed to work fine for about 3 hours. Then it totally shut off and would not do anything. The green light on the front came on and you could hear it power up, but there was no picture and no sound. I decided to take the back cover off and look around to see if I could see anything obviously wrong. There was a lot of dust in there, so I used a can of spray air to get it off the components. I couldn't see anything that looked out of the ordinary to me, so I put the cover back on. When I hit power after that, it worked fine. It continued to work fine for about 4 days, so I thought everything was OK. Then on Saturday I left the house and left the TV on. When I came back, the TV was off and I was back to the power up but no sound or picture problem again. I took the back cover off again and I saw that one of the circuit boards on the bottom had a small bit (about a teaspoon) of oil on it with some black residue in it. So that's my story. Does anybody know what kind of a situation I've got on my hands? This TV is only 3 years old. I'm about to take it to a repair shop, but I wanted to see if anybody had an idea of what was wrong before I did that so I can have an idea of what kind of repair bill I'm looking at. Jeff Haff |
#4
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Magnavox projection TV problem
True, any shop that does not value its technicians time enough to ask
reasonable payment for estimates is likely not going to keep decent techs around very long. Leonard Caillouet "Ol' Duffer" wrote in message ... "Dan Cauley" wrote in message .. . snip Most shops give free estimates. No. Most shops that pay well enough to keep competent techs need to charge a nominal fee to stay in business. Be suspicious of anyone offering a "free" estimate. |
#5
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Magnavox projection TV problem
True, any shop that does not value its technicians time enough to ask
reasonable payment for estimates is likely not going to keep decent techs around very long. Leonard Caillouet "Ol' Duffer" wrote in message ... "Dan Cauley" wrote in message .. . snip Most shops give free estimates. No. Most shops that pay well enough to keep competent techs need to charge a nominal fee to stay in business. Be suspicious of anyone offering a "free" estimate. |
#6
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Magnavox projection TV problem
"Jeff Haff" a écrit le/schreef op/wrote on 6/10/2003
(Jeff Haff) wrote in message . com... I've got a Magnavox 55" projection TV that recently stopped working. Well, it turns out that I had a CRT tube leak onto one of the main motherboards. The repair shop says that I should call Magnavox and see if there is any assistance available in picking up part of the cost. That seems like a long shot at best as the TV is out of warranty. It was purchased in July of 2000 and the CRT was only warrantied for 2 years. This whole problem just seems to be caused by poor design. Why place something with a liquid in it directly over a major electrical component? Oh wait, I see now, maybe it's so they can sell replacement components. Jeff Haff I'm just curious, why don't you listen to the "good" advice that the repair shop gave you. It is not by trying do take the Magnavox name in the dirt that you will be helped by them... Your repair shop is right and Magnavox will indeed pick up part of the costs. Philips and Magnavox are doing this in the entire world, even when the warranty is finished. This is called the "coulance".Only for "special" cases, like this one is. And also, where do you want those tubes? Usually they are close to the mainboard. I wander why i'm telling you this, because you don't deserve to be helped. Anyway, if anybody has a used main circuit board for a Magnavox model 9P5511, let me know. Thank you in advance would be to much? -- alain.beguin : be - 2330 name_nom_naam @ tijd . be |
#7
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Magnavox projection TV problem
"Jeff Haff" a écrit le/schreef op/wrote on 6/10/2003
(Jeff Haff) wrote in message . com... I've got a Magnavox 55" projection TV that recently stopped working. Well, it turns out that I had a CRT tube leak onto one of the main motherboards. The repair shop says that I should call Magnavox and see if there is any assistance available in picking up part of the cost. That seems like a long shot at best as the TV is out of warranty. It was purchased in July of 2000 and the CRT was only warrantied for 2 years. This whole problem just seems to be caused by poor design. Why place something with a liquid in it directly over a major electrical component? Oh wait, I see now, maybe it's so they can sell replacement components. Jeff Haff I'm just curious, why don't you listen to the "good" advice that the repair shop gave you. It is not by trying do take the Magnavox name in the dirt that you will be helped by them... Your repair shop is right and Magnavox will indeed pick up part of the costs. Philips and Magnavox are doing this in the entire world, even when the warranty is finished. This is called the "coulance".Only for "special" cases, like this one is. And also, where do you want those tubes? Usually they are close to the mainboard. I wander why i'm telling you this, because you don't deserve to be helped. Anyway, if anybody has a used main circuit board for a Magnavox model 9P5511, let me know. Thank you in advance would be to much? -- alain.beguin : be - 2330 name_nom_naam @ tijd . be |
#8
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Magnavox projection TV problem
Saw one of these new under warranty. It had a small sliver of metal caught in
the O-ring that seals the filler plug on the coolant chamber. Replaced the o-ring and the Small Signal board. |
#9
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Magnavox projection TV problem
Saw one of these new under warranty. It had a small sliver of metal caught in
the O-ring that seals the filler plug on the coolant chamber. Replaced the o-ring and the Small Signal board. |
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