A Vizio VL370M appears to have a tcon problem:
The first picture is the upper left corner of the screen. The blue part is about 1/2 inch tall. The second picture is the the center of the screen. The orange/red appears to the be the top of a "no video" or other message. The center of the screen has a lighter vertical patch.
Selecting different inputs doesn't make a difference.
ESR on the caps looks okay, low on the power board (UCC KMG and Nichicon YXG), a little higher but not terrible on the processor board (Teapo SH and Taicon HF). Backlight comes on and stays on. Fuse and fusible links (FL) that are present are good.
Chips on the tcon board are
U2- Maxim
17180E
T1920
1TB1 (not sure about that, it's really hard to read)
US3- (TI logo)
TPS6516
94T
AEJ5
U5-
BUF16821
94TG4
US4-
L1117
18A
...and drat, it measures 1.800V with power on, not just good but tauntingly perfect. The connectors at both ends of the short ribbon cables did have some fine dust in them, cleaned with paper. No difference.
Any way to tell if this is maybe the panel or the tcon board without a spare of either to swap? Common failures on the tcon other than the L1117?
Thanks!
The first picture is the upper left corner of the screen. The blue part is about 1/2 inch tall. The second picture is the the center of the screen. The orange/red appears to the be the top of a "no video" or other message. The center of the screen has a lighter vertical patch.
Selecting different inputs doesn't make a difference.
ESR on the caps looks okay, low on the power board (UCC KMG and Nichicon YXG), a little higher but not terrible on the processor board (Teapo SH and Taicon HF). Backlight comes on and stays on. Fuse and fusible links (FL) that are present are good.
Chips on the tcon board are
U2- Maxim
17180E
T1920
1TB1 (not sure about that, it's really hard to read)
US3- (TI logo)
TPS6516
94T
AEJ5
U5-
BUF16821
94TG4
US4-
L1117
18A
...and drat, it measures 1.800V with power on, not just good but tauntingly perfect. The connectors at both ends of the short ribbon cables did have some fine dust in them, cleaned with paper. No difference.
Any way to tell if this is maybe the panel or the tcon board without a spare of either to swap? Common failures on the tcon other than the L1117?
Thanks!
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