just bought 3 flat screen tv's for 25 bucks

No0bZiLLa

No0bZiLLa

Developer
i got a 42" sony, a 32" samsung and a 40" vizio for 25 bucks. after diagnosing the tv's i have spent a total of 72 bucks on parts for the samsung and sony, and the vizio was a blown fuse on the power supply. 450 bucks worth the tv's for under 100 bucks xD

is anyone else repairing tv's? the newer they get, the easier they are to work on...
 
Nope I did stay at a Holiday Inn once though. But on a serious note had really good luck with my TV's and got a good deal on a 65" Vizio 4K UD TV last week for $1,000 out the door.
 
That's a damn good deal. I know I have this one I have wanted to repair for awhile, but it's gonna cost $150 to do it so I have not done it.

Also, do you guys like Vizio? I have a Vizio surround sound that I really like, but I have not heard anyone ever talk about their TVs? I have 2 LGs in my house.
 
tthousand said:
That's a damn good deal. I know I have this one I have wanted to repair for awhile, but it's gonna cost $150 to do it so I have not done it.

Also, do you guys like Vizio? I have a Vizio surround sound that I really like, but I have not heard anyone ever talk about their TVs? I have 2 LGs in my house.
Click to expand...

Usually TV repairs are simple part swaps. for people who do not wish to do this themselves it makes damn near more reasonable to buy a TV then a repair guy with a service fee on top of parts & labor . So if people do not throw them away which happens alot, you can find a good deal on alot of tv's.. Usually if someone says a TV is broken best to do a quick google search of the model for common issues and usually thats all one has to do. Unless its a situation where its something physically broken from abuse.

I have a vizio but its getting up there in age i think its a 54" , but i think from 2009ish, it sucks with displaying of black color. I hate gaming or watching movies that have different shades of black. As you will just see one shade that has no depth to it. but that a tv that is a bit old
 
STLcardsWS said:
Usually TV repairs are simple part swaps. for people who do not wish to do this themselves it makes damn near more reasonable to buy a TV then a repair guy with a service fee on top of parts & labor . So if people do not throw them away which happens alot, you can find a good deal on alot of tv's.. Usually if someone says a TV is broken best to do a quick google search of the model for common issues and usually thats all one has to do. Unless its a situation where its something physically broken from abuse.
Click to expand...

That's not a bad idea, especially with YouTube where you can go and see how to fix basically everything. I've been thinking it would be nice to have a 3rd TV in the house :D
 
also, you can pull schematics and datasheets for any components as well. i could have fixed this sony for a few bucks, but i just couldnt resist just buying the part for 40 bucks haha. the samsung i think had a bad voltage regulator on it, was getting variable readings from it. but for 32 bucks, hell i couldnt resist just to replace the whole damn board :D
 
i also have a toshiba 55sl412u that i cant find the power supply for. it is a completely dead unit actually. no leds light up when plugged in and i checked standby and power on pins. standby is 0v and power on doesnt change when i presss power button. i would assume the problem is the psu. i reckon i will have to trace down the problem on this power supply itself.

another thing is, you will find different brand name parts in other brand tv's. this toshiba has an LG 60" psu in it. but its a hard to find part. i would love to get this thing going. i could sell it for a cool 400-500 bucks easy on facebook
 
I pulled a TV out of the dumpster a few months back. Its a generic 40" LED tv. The led backlights don't work. But the tv itself works fine. If I shine a flashlight into the front of it while it is on I can see the picture on screen. I just don't know where to begin on fixing it. I though about getting self stick led strips and sticking them next to the original ones and powering them separate.
 
No0bZiLLa said:
i also have a toshiba 55sl412u that i cant find the power supply for. it is a completely dead unit actually. no leds light up when plugged in and i checked standby and power on pins. standby is 0v and power on doesnt change when i presss power button. i would assume the problem is the psu. i reckon i will have to trace down the problem on this power supply itself.

another thing is, you will find different brand name parts in other brand tv's. this toshiba has an LG 60" psu in it. but its a hard to find part. i would love to get this thing going. i could sell it for a cool 400-500 bucks easy on facebook
Click to expand...

Maybe another PSU with a similar rating would do for testing, and if its fits and you could find a way to mount it in there securely maybe it would do altogether? Like you say you find different brand stuff inside devices all the time so really its the rating that matters.
 
neruve said:
I pulled a TV out of the dumpster a few months back. Its a generic 40" LED tv. The led backlights don't work. But the tv itself works fine. If I shine a flashlight into the front of it while it is on I can see the picture on screen. I just don't know where to begin on fixing it. I though about getting self stick led strips and sticking them next to the original ones and powering them separate.
Click to expand...
have you go the back off of the tv? do you have a multimeter and know how to use it? measure the power at the connector for the LED's. you should be able to ground to chassis and test each pin on the led connector
 
No0bZiLLa said:
have you go the back off of the tv? do you have a multimeter and know how to use it? measure the power at the connector for the LED's. you should be able to ground to chassis and test each pin on the led connector
Click to expand...


Its odd I'm getting like 30v to it. It reads 30.00 on the DCV 200 setting of this meter - Digital Multimeter - Save on this 7 Function Digital Multimeter, the positive is in the middle connector and ground is on the bottom com port of the meter.

all the pins have power just maybe too much? I'm not sure. Its a SEIKI Model SE40FY27 TV. It would be pretty awesome to get it working.
 
more times than not, the leds actually burn out. one way to test is to get to the leds of the tv and bridge the connectors with solder. the way most of them work are like christmas tree lights, if one goes out, then the rest goes out. you probably just have one that is burnt out. ill see if i cant find any kind of datasheets on that model though and get back to you. are the pics next to the connector marked? you may have to flip the board over to see the correct values and measure with Vdc like you already are and ground to chassis.
 
Thank you. I appreciate the help. I will check this out tomorrow before I go to work as I work a long day today. If it is just one bulb how crappy will the light/picture be if it just wasn't lit, would there be a big dim spot in the screen?
 
Last edited by a moderator:
in led tvs, the led driver is sometimes built into the psu, sometimes they have their seperate board too though. older lcd that are cclf have there own inverter boards and plasma have buffer boards. so check them leds, if the leads for the leds are built into the power supply i would say the psu is fine.

to test the leds, just set your multimeter to continuity setting and check each bulb, if no continuity then it is burnt out. then just desolder it and bridge the burnt out led leads with solder.

neruve said:
Thank you. I appreciate the help. I will check this out tomorrow before I go to work as I work a long day today. If it is just one bulb how crappy will the light/picture be if it just wasn't lit, would there be a big dim spot in the screen?
Click to expand...

you probably wont even be able to tell a difference unless your ocd haha

edit: looks like the tv you have only has one board which hosts the psu/main/led driver ect.

what you need to do is test each led in the panel and if all return good, then you can replace either the board, or what looks like another common failure (which causes no backlight) is this eeprom which looks pretty easy to replace. but like i say, you should do testing before you buy anything because you could just have a burnt led.

i also cannot find any schematics for that board as of yet but ill keep looking.
 
Last edited:
You must log in or register to reply here.

Similar threads

Back
Top