Samsung LN46A550 weird colors

[snake91876]

Weird colors on Samsung ln46a550 is this a tcon or panel failure

[budm]

Re: Samsung LN46A550 weird colors

Bad GAMMA Voltage.
We need to see the pictures of the T-CON board.

[Davi.p]

Re: Samsung LN46A550 weird colors

A55x series has AUO panels with bad as15 chip on tcon, is very well known issue.

[CapLeaker]

Re: Samsung LN46A550 weird colors

got my vote too for the AS15 being bad.

[snake91876]

Re: Samsung LN46A550 weird colors

This is my tcon , I think this is a chi me panel, found new tcon for 38 us dollars, what u think will it fix it.

[budm]

Re: Samsung LN46A550 weird colors

It looks like IC U7 is the GAMMA IC, see if it is AS-15.
You can also see the test points onthe board for testing the GAMMA Voltages, I will not be surprised if you have bad GAMMA IC U7.
You need to match the P/N on the barcode sticker for the correct PCB Assembly number, not the PCB (blank PCB number V520H1-C06).
Go to SJ to find out if there are compatible PCBA.

[Chungalin]

Re: Samsung LN46A550 weird colors

It's an AS19-H1G. It's a voltage buffer like AS15, so it has high chances of being faulty.

This T-CON is also used in 52" panels. Beware if you try to buy the full T-CON: for 46" version, U8 IC position is empty.