TCL L48B2600F vertical lines rhs

[maxvalutech]

Picked this up put out for collection by dumpsters. Starts OK and all works well just has the verticals on rhs screen (from front) and screen of course suspect. This set has low mounted tcon with strip connectors to panel output board across bottom of screen. That board looks ok. Did the usual cleaning etc but no difference. The other problem I notice is that on rhs there is also an image retention issue. So what do you think is it likely screen or is a tcon change warranted.

[CapLeaker]

Re: TCL L48B2600F vertical lines rhs

image retention or a slow to react area in the screen is a tab bond failure. check and press the tab bonds around the problem area and see what happens. If the tcon is a thin long board on the bottom of the display, they are usually tab bonded right to the LCD. If that's the case, its pretty much game over. You can "shim" the problem tab bond and can get more life out of the TV for quite a while.

[Andrew F. Ali]

Re: TCL L48B2600F vertical lines rhs

T_CON Bd seems to be suspect. VGL or VGH voltage on T-CON Bd probably low due to bad-cap. What T-CON voltages do you have at Vin, Vdd, Vda, Vgh and Vgl??

[maxvalutech]

Re: TCL L48B2600F vertical lines rhs

Thanks guys I've been distracted but got back to this one and did try flexing etc on panel board but no change so concentrating on tcon first. The gamma voltages read as OK I believe and others are....VAA 15.22, GVON 1.98, VGL -6.09, BIST 2.77, PWMO 3.27, POL2 nil, VDD12 1.19, VCC 12.21, VDD33 3.28, WPGMA nil, SCL SOA both 3.26, STV 0.01, CE 2.26, CKV 1.33, STVR 0.13, TP2 0.22, VCM 6.13, POL1 1.64, HVAA 7.46 and what most of that means I have no idea!!
The gamma points are numbered 1 2 4 6 8 10 11 12 13 15 17 19 21 22 and voltages come down in steps from 14.19 to 0.20 with none out of step.