- Jan 29, 2004
- 13,679
- 10
- 81
Westinghouse LVM-37W3.
Connection via DVI.
Went out on me last night. As I was typing, the screen did a pixelated wipe to black from left to right that took about two seconds.
No video signal to the panel at all on any input, not even the self generated OSD menus, input source, "no signal", nothing. The backlight is visible, and adjusting backlight intensity changes the brightness of the screen, so obviously it's not a classic backlight or inverter board problem. It appears that the image data itself is no longer making it to the LCD panel and that whole panel is defaulting to it's "on" state (eg: black).
Short of checking the actual display processing board for blown capacitors or reseating various ribbon cables, any ideas? No smoke or abnormal heat or smell or anything detectable. Have yet to crack it open.
Anyone experienced with electronics/LCD repair ever experienced the symptom of the screen actually doing a gradual fade/wipe when going out? It appeared as though a ribbon cable slowly pulled out of it's socket and wiped the screen as rows and columns unplugged from one edge of the cable to the other, but I know there is no such cable and that data is sent serially and that the glass panel itself has it's own microcontroller much like a keyboard controller to actually address rows and columns.
Connection via DVI.
Went out on me last night. As I was typing, the screen did a pixelated wipe to black from left to right that took about two seconds.
No video signal to the panel at all on any input, not even the self generated OSD menus, input source, "no signal", nothing. The backlight is visible, and adjusting backlight intensity changes the brightness of the screen, so obviously it's not a classic backlight or inverter board problem. It appears that the image data itself is no longer making it to the LCD panel and that whole panel is defaulting to it's "on" state (eg: black).
Short of checking the actual display processing board for blown capacitors or reseating various ribbon cables, any ideas? No smoke or abnormal heat or smell or anything detectable. Have yet to crack it open.
Anyone experienced with electronics/LCD repair ever experienced the symptom of the screen actually doing a gradual fade/wipe when going out? It appeared as though a ribbon cable slowly pulled out of it's socket and wiped the screen as rows and columns unplugged from one edge of the cable to the other, but I know there is no such cable and that data is sent serially and that the glass panel itself has it's own microcontroller much like a keyboard controller to actually address rows and columns.
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