Re: Vizio E321VL - backlights but no OSD
No problem. This better?
No problem. This better?
Attached Files
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Re: Vizio E321VL - backlights but no OSD
Great. Check here for 12V.Attached FilesPlease 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 E321VL - backlights but no OSD
0 vdcComment
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Re: Vizio E321VL - backlights but no OSD
That points to the main board not turning on the T-con power so obviously no video.
Check all regulators on the main board -- standard Vizio procedure.
Also any way you can test sound? Hook external source up and flick through inputs using input or source button.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 E321VL - backlights but no OSD
U8 and U5 show no voltage on input, adjust and out. U4 shows voltage on all three pins.Comment
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Re: Vizio E321VL - backlights but no OSD
What are the voltages on U4? And the part #?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 E321VL - backlights but no OSD
My mistake.....I didn't have power to the board. Showing the following voltages with respect to ground:
U4
VIn = 5.27
VOut=3.30
VAdj=2.05
U5
VIn = 3.34
VOut=1.81
VAdj=0.55
U8
VIn = 3.34
VOut=1.25
VAdj=0.00Comment
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Re: Vizio E321VL - backlights but no OSD
These are 1117 SMD regulators.Comment
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Re: Vizio E321VL - backlights but no OSD
All regulators are fine. I am a little stumped now, I would suggest a microprocessor/firmware problem, though it could also be a bad power switch for the T-con power.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 E321VL - backlights but no OSD
OK, thanks for you help. Confident that the problem lies on the MB?Comment
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Re: Vizio E321VL - backlights but no OSD
With a Vizio that's about the only thing that seems to go wrong. I am 85-90% confident.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 E321VL - backlights but no OSD
If it is a firmware issue, does that imply that I can flash the firmware or upgrade it? If so, suggestions on how to do it?Comment
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Re: Vizio E321VL - backlights but no OSD
You can try contacting Vizio directly -- some people have had them send out a little box which plugs into the VGA port and flashes it that way.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 E321VL - backlights but no OSD
Good night.Comment
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Re: Vizio E371VL - backlights but no OSD
Just realized that this set is an E371VL and not an E321VL.Comment
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'Morning,
I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.
Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.
I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.
I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate... -
This Vizio came in the shop with no backlights. Replaced all the strips with replacement from Shop Jimmy. Set now has backlights but lights pulsate on left side. Half the screen brightens up then goes to normal then repeats.
Am I looking at a defective strip? Thanks in advance. -
I've had this monster for several months as I've hesitated to order backlights for it. Finally did order them and they are due to arrive tomorrow. Besides having ample space to work, are there any recommendations for working on such a massive screen? Should I remove the panel by myself or would 2 people be a better choice? I bought the double-cup suction cups from Harbor Freight and have been using them for the last few repairs on smaller screens. They are far superior to the single cup orange ones I used previously that would often let go without warning 😱.
I have not replaced... -
Hello all,
I’ve tried to repair TVs in the past with some luck. Toms repair manuals got taken down and now thats a bit harder.
I picked this TV up hoping for a quick fix. When the TV would power on, only the backlights would come on. The owner told me they heard loud screeching before it shut off. This alone makes me want to think the main board has an issue.
As I researched, I found the TCON/driver boards were an issue on this unit. I went in troubleshooting the TCON but found good voltages on the TCON. I followed shop jimmys guide to test the transistors and they seem okay.... -
Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side...
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