Re: Samsung LNS3241D - No picture, sound and backlight OK
Yep, it was the T-con board. Replaced it and all is well again. Thanks everyone for the help.
Kristofor
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Last Activity: 11-09-2011, 10:24 PM
Joined: 10-30-2011
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Re: Samsung LNS3241D - No picture, sound and backlight OK
Thank you for your assistance Tom. I do have one more observation and another question to make sure the problem is not with the main board.
In an earlier post i listed voltages from the LVDS cable with all cables connected. Last night i unplugged the LVDS cable on the main board to gain access to the rest of the pins on that cable, this is what i measured:
GND; -0.001
A1+; 1.028
A2-; 0.795
GND; 0
CLK+; 1.308
A3-; 1.220-1.226
GND; 0
PANEL_V; 3.528...Leave a comment:
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Re: Samsung LNS3241D - No picture, sound and backlight OK
I just can not find an L33 anywhere. There are several V33's indicated and each measures 3.3VDC.
I did notice a POW_ON label near RP27 with a solder connection that i could probe. It only measures 0.005VDC. It is located just above the LVDS cable, above and to the left of F1. Any ideas that this is normal?Leave a comment:
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Re: Samsung LNS3241D - No picture, sound and backlight OK
Thanks, I'll check out L33V when i get home.Leave a comment:
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Re: Samsung LNS3241D - No picture, sound and backlight OK
I did measure F1 Tom. Resistance is near zero with the power off. I measure 5VDC on both sides with power on. Thanks for the feedback.
It may be interesting to note that the TV behaves exactly the same with the LVDS cable (I believe that is the cable to the T-con from the main board) connected or not.
Please keep the suggestions coming...Leave a comment:
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Re: Samsung LNS3241D - No picture, sound and backlight OK
Thanks Tom, Attached is a pic of the Tcon board......Leave a comment:
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Re: Samsung LNS3241D - No picture, sound and backlight OK
Thank You Bill.
I did not know how to isolate the problem between the main board and Tcon. Is there a preferred place to purchase the Tcon board? Any places i should stay away from? Should i get the cable too?
If it makes a difference, I did measure a few voltages on the LVDS connector on the main board side (ones that i could get to). All measured referenced to frame ground, VDC:
AO1; 1.159
A1-; 1.186
GND; 0
A2+; 1.235
CLK-; 1.156
GND; 0
...Leave a comment:
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Samsung LNS3241D - No picture, sound and backlight OK
Four year old LCD TV first started showing problems with intermittent vertical lines across the entire screen; of varying number, width, and color. Now it turns on and stays on, but there is no picture, not even for a second; does not matter what source. Even the menu items do not display. The audio is fine and the backlight is on.
I replaced a bulging 470uF, 25V cap.
24VDC checked going to the inverter board.
5.4, 12, and 13VDC look good going to the main board.
LVDS cable and end connections appear okay. Contacts cleaned.
Fuse F1 on the Tcon board is...
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