LCD TV Repair made easy # 10 - LCD Television
LCD TV Repair made easy # 10
tvrepairinfo.com In this video I showed an actual repair I did on one of my customers TVs. At the bottom of this info section I list all the part I used to repair this TV Listed below are some good resources for anyone interested in learning more about electronics repair.Troubleshooting & Repairing LCD TVs by John Preher at http For someone new to electronics the first few pages of this book may be a bit challenging but the majority of this book is easy reading with lots of pictures,diagrams and useful troubleshooting techniques. Johns book gives you a good idea about the main test points you should look for and their approximate voltages. ======================================== How to troubleshoot and repair Switch Mode Power supplies by Jestine Yong at davestv.jestinemichellepow.click2sell.eu This book is a bit spendy but nevertheless it's the best book I have ever read on switch mode power supplies. Because Jestine works as a repair technician he is good at getting right to the main points we need to understand about this kind of power supply rather than just being good at general theory. Since a majority of the problems I have seen on LCD TVs are related to bad power supplies this is one book I highly recommend. Most of the book was easy reading with plenty of pictures and diagrams. ======================================== Testing electronic components and finding unknown resistor values by Jestine Yong. http I have not yet read Jestines book on Testing electronic ...
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i think the software solution is safer and easier, why not try them first, i found two here: appnee.com/udpixel/
ReplyDeleteAny suggestions to my video regarding the lcd tv backlight please?
ReplyDeleteyoutube.com/watch?v=Yzd_ICYb06Q&feature=youtu.be
The lamp only stays on for 3 seconds...is normal?
Thanks for the comment Tom. It's always fun to hear from another technician. The population of Grants Pass is around 35,000 and there are a couple other shops besides
ReplyDeletemyself. Fortunately your correct about most people being to intimidated to do their own repairs. If you ever make it up this way stop in and say hello.
Dave
Just wanted to comment on the techs that do not like what you are doing. I am a 62 year old who has been doing all types of electronics for over 35 years. I am the only tech left in NW Okla., and service about 100,000 people. My shop is so full, I can barely walk thru, with a waiting list over a month long. I wish every customer would watch your videos before calling me. Most would still be too intimidated to do the repair. Keep up the good work! by the way, my brother lives in Medford.
ReplyDeletei have this same tv with same problem. please email me your info do i can take it to you if your willing yo fix it. azotameboricua2000@yahoo.com
ReplyDeleteI have a Dell W3207C that turns on and then goes off. The LED flashes amber. No click noise or noise in general. I can see the screen backlight turn on, LED is solid blue, then the backlight turns off and LED flashes amber. I was told I should replace my mainboard. It once turned on to the Dell logo floating around but never again. I opened and inspected the mainboard and power supply but found no obvious defective parts.... should I order the mainboard and give it a try?
ReplyDeleteI can't guess at what's wrong with your TV, but if you suspect diode D10 might be bad Why don't you test it?
ReplyDeleteSomeone said D10 it crosses to an ECG 576 but I haven't verified this. The numbers of the diode are on the side of it.
I have the same issue, changed the c16,c17, the 2 transistors, and f2 fuse ..... my local repairman also mentioned the d10 diode. At first, the board gave me a flashing red light, then after parts changed no red light, but can here a faint clicking sound coming from the transformer that is between the 2 black heat sinks. Does it sound like the D10 diode causing this, and if so do you have a number for the actual diode (if not I will pull the board again)?
ReplyDeleteLoved Video 10. Because you are working on my exact tv. Or the same power supply board. I changed the 450uf caps and you talk about the infertor transistors and transformers....argh...I have the tv with red led that changes to blue led..when switched on. No pic or sound. Would you suggest anything along your video for this problem too? Tks
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my tv tuns on but there is no video or audio only the LED turns blue on the panel, i change the cap C16 and 17, was blow up, and still the same
ReplyDeletecan you please help me here
thanks
You make great videos.
ReplyDeleteLike little detective novels.
You could use your volt meter on the ohms scale or on the diode check scale to test the transistors for shorts. I'm sure youtube has more info on this other than what I show my videos.
ReplyDeleteHow do I go about testing the transistors? I have a voltage meter and a esr meter.
ReplyDeleteThanks for your reply's.
I don't know which parts on your TV are bad but the Two transistors I replaced on mine were ordered from digikey. The manufacturers part numbers for both transistors is FQPF9N50CF There location was Q17 and Q18
ReplyDeleteTest the old ones before assuming they are bad becaues they may not be. Also scroll down in the info section of this video and you may find some additional info which helps you.
I have a TDX-03211C with the exact same problem. One visible bad cap in the same place. I replaced both caps and now my tv powers but no display. The power board light flashes on and off. Could you tell me where to order the other parts that may fix this tv?
ReplyDeleteThanks
Yes if the voltages match up that means it's good.
ReplyDeleteCan you just check the voltage output of the power connector(s) leaving the SMPS board? Some of these connectors have the voltage output expected silk screened on the PCB. If these all match the silk screened values doesn't that indicate that the SMPS board is good?
ReplyDeleteI don't have any videos on testing regulators but many of the three pin regulators check the same way as any bad transistor or diode. Their junctions short out and bond as though they were a solid piece of wire rather than a semi conductor.
ReplyDeleteyou have video showing how to test the voltage regulators? i also have vizio gv42l fhdtv back lights work PS fine caps look good was told to check regulators on main board
ReplyDeleteThank you for your quick reply. Will do. :)
ReplyDeleteIf your back lights were working there was no point in replacing the inverter board. I start by testing power supply voltages and then some of the regulators including the real small ones on main boards.
ReplyDeleteIts a 42 " LCD Vizio.. SVT Series if that matters
ReplyDeleteWithout getting to technical .. I have a Vizio that was refurbished and only 5 months old.. I The picture only went out one day with sound.. The backlights are working as I can see them through the vents.. Someone told me to replace the inverter board.. well that was done and this didnt make a difference... I have a volt tester.. what would be your opinion on the issue here? Thanks
ReplyDelete