Just got a T400 with bad backlight

[Unknown_K]

I just got a T400 2676W1T unit with a backlight that goes out a few seconds after I turn it on. Unit works fine on external VGA. The inverter looks ok (nothing burned) but makes noise on startup and then goes quiet when the backlight goes out. I didn't notice any pink discoloration on the screen when it did work.

Could it just be the inverter (ordered one since they are cheap) or is the CCFL dead/dying?

Is it worth bothering to get a LED backlight screen assembly for this model? Changing backlight tubes is a pain.

[RealBlackStuff]

That 2676W1T MTM points to an ancient R30.
Did you mean: 2767-W1T?

Sounds like a broken CCFL.
Starts up, CCFL heats up and the heat causes the CCFL-crack to widen, after which it switches off.
But if you're lucky, it could just be a bad inverter. Swap it and see.

To use a LED-screen you'll also need a LED-sub-board and a LED-LCD-cable.
Or swap the complete lid from a T400 or R400.

[TonyJZX]

you need to find out exactly what screen model it is

then find out replacement costs

I'm sure you can upgrade a CCFL to an LCD.

I personally would not pay to replace an entire CCFL screen but I think you can just replace just the CCFL bulbs.

[Unknown_K]

Depending who made the screen, replacing bulbs can be a real pain in the rear.

Yes, I meant 2767W1T S/N L3-AHC3E 08/10 type 2767-CTO

[Unknown_K]

I ordered a new inverter and a new bulb, if I can't get the screen fixed I will order a new one.

[jaspen-meyer]

I'd get a used machine with an LED screen. You get the screen, and a parts machine.

[Unknown_K]

I have $20 into this machine, add another $15 for the inverter and bulb. I purchased the tube mostly because if you collect old Thinkpads you eventually will need to get good at CCFL replacements. If/when I can't get it working a new screen will be the next move.

[jaspen-meyer]

if you collect old Thinkpads you eventually will need to get good at CCFL replacements.

I replace CCFL backlights with LED backlights.

[Unknown_K]

Well the inverter came in before the bulb so I installed it. Seems to work ok (backlight has yet to shutoff after 45 minutes) but the inverter seems to get pretty warm (not making noise like the other one did).

[Unknown_K]

Nevermind the BL went out again after the inverter cooled off. I assume the tube was drawing more power then normal and needs replaced.