Hi,
My five year old LCD bought in late '09 (manufactured September '09) just started producing a really dark picture from a cold start after a couple of days without any use.
The picture is dark in all inputs, menus and usb media player.
Did the following with no results:
mess with color options/wb
factory reset
messed around in the service menu tool options 1 (panel type) 3,4, WB, test pattern (only showed white)
Updated firmware from 3.15 to 3.75 (service menu shorcut not working/altered?)
swabbed with alcohol and resat t-con flat cables and connectors
heat gunned as15-hf to try reflowing
No change at all.
Caps visually look ok. Everything looked clean and new for a five year old set. Just a couple of wires got loose from the tape holding them on the backplate. The t-con is an AUO ref T420HW04 V0 42T06-C03 barcode UZ-5542T06C16
The picture isn't solarized/negative like in most faulty AS15, but I suspect this GAMMA chip. It has no thermal pads like the samsung models, no heat dissipation at all on the t-con. Just one chip on the main board and of course the bulky power board have heatsinks.
Any idea besides getting a presumably new t-con over [fl]e[a]bay? Or toss it for a new one like the manufacturers want us to do? The resoldering of this tinny SMD is beyond my skill set, might try it later if a new t-con fixes the LCD. The chip on this board is AS15-HF, are AS15-F and AS15-G compatible?
My five year old LCD bought in late '09 (manufactured September '09) just started producing a really dark picture from a cold start after a couple of days without any use.
The picture is dark in all inputs, menus and usb media player.
Did the following with no results:
mess with color options/wb
factory reset
messed around in the service menu tool options 1 (panel type) 3,4, WB, test pattern (only showed white)
Updated firmware from 3.15 to 3.75 (service menu shorcut not working/altered?)
swabbed with alcohol and resat t-con flat cables and connectors
heat gunned as15-hf to try reflowing
No change at all.
Caps visually look ok. Everything looked clean and new for a five year old set. Just a couple of wires got loose from the tape holding them on the backplate. The t-con is an AUO ref T420HW04 V0 42T06-C03 barcode UZ-5542T06C16
The picture isn't solarized/negative like in most faulty AS15, but I suspect this GAMMA chip. It has no thermal pads like the samsung models, no heat dissipation at all on the t-con. Just one chip on the main board and of course the bulky power board have heatsinks.
Any idea besides getting a presumably new t-con over [fl]e[a]bay? Or toss it for a new one like the manufacturers want us to do? The resoldering of this tinny SMD is beyond my skill set, might try it later if a new t-con fixes the LCD. The chip on this board is AS15-HF, are AS15-F and AS15-G compatible?
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