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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Panasonic TX-L39E6B Fault

 
 


stevenevenage
New User

Jan 22, 2018, 7:39 PM

Post #1 of 6 (958 views)
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Panasonic TX-L39E6B Fault Can't Post
My beloved Panasonic TX-L39E6B has recently developed a fault which I cannot figure out.
If anyone could help me diagnose this issue I would be forever grateful.
Basically the TV has a pattern of lines moving over the picture.

Please see the attached pictures and video:
- HDMI Channel
- HDMI after pressing vol up/down twice
- DTV Channel
- Firmware Version
- Video

The pattern persists if there is no source video. Audio is unaffected. Power cycle is ineffective. Removing all connected peripherals is ineffective.
As you can see from the images the line display differently on the DTV channels the HDMI / Direct Source channels.
On a HDMI channel when the screen starts to artifact/tears pressing the volume up/down button twice temporarily removed the fault.

Firmware is up @ Ver. 3.734 as per Panasonic support


(This post was edited by stevenevenage on Jan 23, 2018, 1:07 PM)



jts1957
Veteran


Jan 22, 2018, 11:21 PM

Post #2 of 6 (955 views)
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Re: [stevenevenage] Panasonic TX-L39E6B Fault [In reply to] Can't Post
Try unplug & reseat flat ribbon cables, where possible, to/from Tcon board.
Pana support link no work so well.


-------------------------
Location: Far, Far Away

(This post was edited by jts1957 on Jan 22, 2018, 11:23 PM)


stevenevenage
New User

Jan 23, 2018, 7:00 PM

Post #3 of 6 (941 views)
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Re: [jts1957] Panasonic TX-L39E6B Fault [In reply to] Can't Post
I have fixed the link.
Picture was fine with ribbon cables disconnected.
Picture test mode shows no artifacts or lines.
I think Its the main controller board.


jts1957
Veteran


Jan 23, 2018, 8:44 PM

Post #4 of 6 (940 views)
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Re: [stevenevenage] Panasonic TX-L39E6B Fault [In reply to] Can't Post
Quote
Picture was fine with ribbon cables disconnected.
https://i.ebayimg.com/...Xf9Zovbp/s-l1600.jpg

I don't see how picture can be fine when any or all of THESE ribbons are disconnected.


-------------------------
Location: Far, Far Away


stevenevenage
New User

Jan 23, 2018, 9:03 PM

Post #5 of 6 (935 views)
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Re: [jts1957] Panasonic TX-L39E6B Fault [In reply to] Can't Post
You are correct. My mistake. I didnt explain correctly.
With ribon cables from mainboard to tcon board disconnected there was no picture.
I have ordered a replacement main board. Will report the results.


jts1957
Veteran


Jan 24, 2018, 12:58 AM

Post #6 of 6 (933 views)
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Re: [stevenevenage] Panasonic TX-L39E6B Fault [In reply to] Can't Post
Still doesn't eliminate Tcon.

Quote
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in 'A' board.


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Location: Far, Far Away

 
 
 


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