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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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Mitsubishi 50" tv that won't turn on.
This is the typical problem that I see with these tv's posted all over
the internet, hit the power button, light is green for a few seconds, and then turns off. I haven't found any good suggestions as to the cause or possible fix for it, outside of sending it to a tech. That is fine, as my last option, but I come to these sites for suggestions as to what "I" can do to fix the problem with as little money going out as possible. The tv is a VS-50603 and is about 5 years old, so the other thing I see is, "buy a new tv". I have no problems with this tv, when working, and it is the one I have in my bedroom, so I don't care to spend a lot to replace a tv in my bedroom, I have a much newer one in the living room and it cost more than enough. Also, this may just be me, but I would like to get more than 5 years out of something this expensive. It still looks brand new and is just a couple years out of warranty, so I don't want to scrap it. My parents had their tv for about twenty-five years, so I'd hate to think that quality of products is getting that much worse, even though I know that it is. It started smoking a while back when I turned it off and I had a tech come pick it up for $80 and they charged me $370 to replace a board that blew out. So, a few months later, this happens. I don't believe the two are related and don't believe that he did anything wrong, it worked fine for 3 months. Any suggestions would be greatly appreciated. Thank you in advance. |
#2
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3 months ? Call the tech back
wrote in message oups.com... This is the typical problem that I see with these tv's posted all over the internet, hit the power button, light is green for a few seconds, and then turns off. I haven't found any good suggestions as to the cause or possible fix for it, outside of sending it to a tech. That is fine, as my last option, but I come to these sites for suggestions as to what "I" can do to fix the problem with as little money going out as possible. The tv is a VS-50603 and is about 5 years old, so the other thing I see is, "buy a new tv". I have no problems with this tv, when working, and it is the one I have in my bedroom, so I don't care to spend a lot to replace a tv in my bedroom, I have a much newer one in the living room and it cost more than enough. Also, this may just be me, but I would like to get more than 5 years out of something this expensive. It still looks brand new and is just a couple years out of warranty, so I don't want to scrap it. My parents had their tv for about twenty-five years, so I'd hate to think that quality of products is getting that much worse, even though I know that it is. It started smoking a while back when I turned it off and I had a tech come pick it up for $80 and they charged me $370 to replace a board that blew out. So, a few months later, this happens. I don't believe the two are related and don't believe that he did anything wrong, it worked fine for 3 months. Any suggestions would be greatly appreciated. Thank you in advance. |
#3
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Coolant leaks from the CRTs are a common problem on these sets and if the
chassis was moved this is even more likely. Leonard wrote in message oups.com... This is the typical problem that I see with these tv's posted all over the internet, hit the power button, light is green for a few seconds, and then turns off. I haven't found any good suggestions as to the cause or possible fix for it, outside of sending it to a tech. That is fine, as my last option, but I come to these sites for suggestions as to what "I" can do to fix the problem with as little money going out as possible. The tv is a VS-50603 and is about 5 years old, so the other thing I see is, "buy a new tv". I have no problems with this tv, when working, and it is the one I have in my bedroom, so I don't care to spend a lot to replace a tv in my bedroom, I have a much newer one in the living room and it cost more than enough. Also, this may just be me, but I would like to get more than 5 years out of something this expensive. It still looks brand new and is just a couple years out of warranty, so I don't want to scrap it. My parents had their tv for about twenty-five years, so I'd hate to think that quality of products is getting that much worse, even though I know that it is. It started smoking a while back when I turned it off and I had a tech come pick it up for $80 and they charged me $370 to replace a board that blew out. So, a few months later, this happens. I don't believe the two are related and don't believe that he did anything wrong, it worked fine for 3 months. Any suggestions would be greatly appreciated. Thank you in advance. |
#4
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wrote in message oups.com... This is the typical problem that I see with these tv's posted all over the internet, hit the power button, light is green for a few seconds, and then turns off. I haven't found any good suggestions as to the cause or possible fix for it, outside of sending it to a tech. That is fine, as my last option, but I come to these sites for suggestions as to what "I" can do to fix the problem with as little money going out as possible. The tv is a VS-50603 and is about 5 years old, so the other thing I see is, "buy a new tv". I have no problems with this tv, when working, and it is the one I have in my bedroom, so I don't care to spend a lot to replace a tv in my bedroom, I have a much newer one in the living room and it cost more than enough. Also, this may just be me, but I would like to get more than 5 years out of something this expensive. It still looks brand new and is just a couple years out of warranty, so I don't want to scrap it. My parents had their tv for about twenty-five years, so I'd hate to think that quality of products is getting that much worse, even though I know that it is. It started smoking a while back when I turned it off and I had a tech come pick it up for $80 and they charged me $370 to replace a board that blew out. So, a few months later, this happens. I don't believe the two are related and don't believe that he did anything wrong, it worked fine for 3 months. Any suggestions would be greatly appreciated. Thank you in advance. It's one of those situations where either you know where to start diagnosing and can provide some more details so people can make suggestions, or you should have a tech look at it. There's really no magic button you can push inside to make it work, any number of things could fail and cause the no power symptom. |
#6
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I too just posted concerning the same brand and same problem.
I too saw the same problem posted repeatily. I suspect it is a very common problem that spans the Mits line. I have yet to see anyone discuss the solution. If anyone knows the Mits line and this problem, I would love to hear a technical discusson as to why it is happening. Anyone with a schematic who can take a look? Cany anyone post a schematic so we can all look? Thanks TMT |
#7
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"Too_Many_Tools" wrote in message oups.com... I too just posted concerning the same brand and same problem. I too saw the same problem posted repeatily. I suspect it is a very common problem that spans the Mits line. I have yet to see anyone discuss the solution. If anyone knows the Mits line and this problem, I would love to hear a technical discusson as to why it is happening. Anyone with a schematic who can take a look? Cany anyone post a schematic so we can all look? Thanks TMT As I posted earlier, that symptom could be caused by any number of problems, you simply have to do some troubleshooting to narrow it down a little, otherwise it's like asking "my car won't run, what's wrong with it?" |
#8
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James Sweet wrote: "Too_Many_Tools" wrote in message oups.com... I too just posted concerning the same brand and same problem. I too saw the same problem posted repeatily. I suspect it is a very common problem that spans the Mits line. I have yet to see anyone discuss the solution. If anyone knows the Mits line and this problem, I would love to hear a technical discusson as to why it is happening. Anyone with a schematic who can take a look? Cany anyone post a schematic so we can all look? Thanks TMT As I posted earlier, that symptom could be caused by any number of problems, you simply have to do some troubleshooting to narrow it down a little, otherwise it's like asking "my car won't run, what's wrong with it?" That one's real easy to answer, James. It's broke! Sorry, couldn't resist. Ken |
#9
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Cant be done . There are to many parts that could be the cause . You
have to be able to use test equipment on it . Lesson i have learned by working on many big screen tv sets .. Dont buy them . |
#10
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"Ken G." wrote in message ... Cant be done . There are to many parts that could be the cause . You have to be able to use test equipment on it . Lesson i have learned by working on many big screen tv sets .. Dont buy them . Yeah, wait until someone is tired of the broken one taking up space in their house then get it for free, got 5 or 6 of them that way and just kept trading up until I had a nice one and everyone else in my family who wanted one or had space has one but they can be a real pain to work on. |
#11
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I realize that the symptom COULD be caused by any number of problems
BUT since the symptom seems to be common to a significant number of sets and seems to be the SAME symptom I would wager that the same basic circuit is at fault. My set is a 27" set...not exactly a large screen tv. Again if anyone has access to the schematics, feel free to post an image so we can all look at it...remember this is sci.electronics.REPAIR. ;) TMT |
#12
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"Too_Many_Tools" wrote in message oups.com... I realize that the symptom COULD be caused by any number of problems BUT since the symptom seems to be common to a significant number of sets and seems to be the SAME symptom I would wager that the same basic circuit is at fault. My set is a 27" set...not exactly a large screen tv. Again if anyone has access to the schematics, feel free to post an image so we can all look at it...remember this is sci.electronics.REPAIR. ;) TMT It's just not that simple though, in some sets there's a common problem that causes that model to exhibit those symptoms, in many there's a lot of things that can and do occasionally go wrong. I thought we were talking about a 50" Mitsubishi? What model is your 27"? Even if it's the same brand, internally it will have almost nothing in common with a projection set. |
#13
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We are talking about two different sets with the same problem.
I would normally agree that it is unlikely that they would be common BUT if you search the archives you will see the on-off problem seems to be very common to Mitsubish larger sets. This strongly suggests that they used the same common circuits for the startup/power supply...I would if I were the designer to keep production costs low across the different lines. Again, doesn anyone have a circuit schematic available? TMT |
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