I need some assistance with my Vizio GV42L HDTV. Once I plug it in, the front logo lights up amber with no picture. I have a clicking noise that does not stop and is continues. I have open the TV up and replaced the 835-1A-B-C 12v R1 relay with no luck.
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Is it the relay that is actually clicking? Have you isolated the noise source using precision instrumentation? (sometimes known as a cardboard toilet roll tube)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I do not have any other testing equipment other then a quality multimeter. I attempted to identify the source of the clicking my simply touching each component in the area. The vibration is the strongest at the relay, but I understand this is not that wise or accurate.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I was joking about precision instrumentation
- Just place a cardboard roll against your ear and try and isolate the noise. Works very well. It wouldn't be advisable to touch any mains side components with the TV on, as high voltage may be present there.
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
The clicking seems to be coming from the relay and I can hear (using the paper towel tube) a zapping coming from the large capacitor. This capacitor looks good, not swollen. Any ideas?Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I have just sold one yesterday. On mine it was a black screen with a couple of colored vertical lines and it ended up being the famous U33 regulator on the mainboard.
Maybe the power supply it's at the limit of starting up.
Picked it up for $30 and a half an hour fix( 1x VDO)= $300
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
tom66 do you agree with tibimakai that the U33 might be the problem? The thing is I am not getting any picture at all.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I located what I think is the U33. How can I test this? If this is whats bad, this is testing my skills on soldering...Attached FilesLast edited by schwegy; 09-28-2012, 12:21 PM.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Have you posted a picture of your main board?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Your board it's different.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
The U33 on this board is not the LDO 3-PIN regulator IC like other chassis.
Can we see good clear pictures of the main board?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Here's a nice thread by retiredcaps on how to test regulators:
https://www.badcaps.net/forum/showthread.php?p=266372Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Attached is my TV board.Attached FilesComment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I have a vx42L which looks like it has the same internals as this one. I however don't have any clicking. My vizio emblem glows orange. power button does nothing. If i press the blue button on the bottom left of the main board for about 10 secs, i can then hit power and it will turn the emblem white. This kicks on my 12v, and 24v rails on the power board. I have 24v at both inverter boards plugs. Not sure where to go now. Sorry if you feel I'm hijacking, I will gladly start my own thread. I just figured it was a similar problem on a nearly the same tv. u33 has 5v 3.25v 2.00v on the 3 leadsComment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
See this video: http://www.youtube.com/watch?v=cNFzBJELFoUPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
@schwegy, I can see some 3-pin LDO on the main board. Can you post clear and focused picture of the main board alone?
You can disconnect the top two white connectors that go to the Inverter boards and see if the clicking sound stops.
By the way, where is the relay you replaced located?Last edited by budm; 09-29-2012, 07:17 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
tom66, I wasn't clear as far as the backlight goes. It has no backlight. The power is to the inverters, but I guess no bl_on signal. I tested the voltage regs that the video suggests, and found two that were off. U2 had 5.14 feed 1.43 adj 2.30 out U9 had 3.25 feed 0.02 adj and 1.5 out . I'm going to check skycraft, its my local military surplus electronic supply house, and if they don't have them, I will order from digikey. I'll let you guys know the results.
Thanks Tom, Nice job!Last edited by Worminizer; 09-30-2012, 09:10 AM.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
Bad regulators on Vizios can cause a lot of issues. The type of regulator you need is a 1117 type, SOT223 package. Where the device on the motherboard says "-33", "-25", "-ADJ" etc. it's important to match those.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Vizio GV42L HDTV amber light no pic only clicking rapidly
I just took a closer look at U9 before I left and its a fixed voltage 1.5, so its fine. Therefore U2 is the only bad one that I have found. I will reply again when I get the new reg.Comment
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PSU - BN44-00878A
Symptoms:
The TV turned itself off, and I haven't been able to turn it back on. The standby voltage was unstable and lower than it should be.
A weak clicking sound was coming from the transformer.
Video with clicking sound:https://www.youtube.com/watch?v=lAduhjNtqCA
Progress:
After the transformer, I measured four Schottky diodes. DM862C and DM864C diodes readings were 003 in both directions. After detaching them from the circuit and measuring them, DM864C was the shorted one. These Schottky diodes are SB550.I... -
Hello, I bought this Mac from a friend, he said that it simply stop working. The MacBook looks very clean but does not power on, stuck on 5v 0.42A, and sometimes display 5V and 0A (then 0.071A and again 0A).
I opened it looking for some problem, it was not touched before for sure and the board is very clena, no spot of corrosion at all from what I can see. Voltage on multimeter of the board off the case it's the same, 5V 0.42A. But then I noticed this "clicking sound" come from the board ( I attached here the audio file).
Looking on google I found this:... -
Good Day.
I just replaced tcon on my sony kdl 65xg9505 and getting green amber leds blinking. all voltages are ok according to working sequence.
i downloaded firmware from sony and there is no .pkg fike.. after extracting it gives another file which contains multiple files like inf, payload.bin and 3, 4 other files. i just did that usb but did not worked. anyone knows anything how to do it..?
green amber blinking stops after while and then starts again. tv responds to remote control on off etc. before installing new tcon backlite was coming on without backlite... -
The board is daox8cmb6eo and i can't find no boardview or schematics on the forum or anywhere...
So i plug in the charger, amber light starts blinking ,there is 3.3V and 5V present, and 2.4V on the power button,board doesn't turn on, no shorts...
I've tried flashing the bios...
interesting thing is the battery was around 7,8V, and it's 11.1V battery, the mosfet near the battery is open, but not charging,i desoldered it,tested it and it's fine ,but the amber light kept going on the charger so i charged the battery with power supply and got it to about 10.5V... -
I have a UN60D8000YF with a BN44-0432A power supply and a BN41-01622C main board.
The set was working then not,then started clicking.
Wilth the power supply disconnected from the main board I can occasionally get it to power the LED back lights , getting it to stop clicking is luck.
Checked caps and diodes and mosfets the best I could. When it stop clicking there is 5v and 18v on the connector to the main board.
A schematic or suggestion would be great.
Thanks
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