T40 Display problem

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vanlagan · #1 Post by **vanlagan** » Mon Feb 22, 2010 10:03 pm

I have a T40 that has display issues.
When on battery power the backlight does not work, if I play with the "lid-closed" button the display flashes on and off.
If plugged into AC or on the dock it functions as it should.
So what do I need to replace?
Any help would be appreciated!
Thanks

ajkula66 · #2 Post by **ajkula66** » Tue Feb 23, 2010 12:12 am

Welcome to the forum, neighbour!

Is your LCD reddish/pinkish on initial boot?

vanlagan · #3 Post by **vanlagan** » Tue Feb 23, 2010 4:15 pm

Thanks for the welcome!
No, the colors are perfect. No change from new.

vanlagan · #4 Post by **vanlagan** » Wed Feb 24, 2010 6:08 pm

Anybody????

#5 Post by **Harryc** » Wed Feb 24, 2010 6:17 pm

What happens if you plug in an external monitor/LCD and run the T40 on battery?

vanlagan · #6 Post by **vanlagan** » Thu Feb 25, 2010 6:40 pm

Just tried with the external. Nothing on the external at all. When I unplug the cable I get the no signal screen but when I plug the cable into the laptop the external monitor goes black.

#7 Post by **Harryc** » Thu Feb 25, 2010 6:43 pm

I'd be tempted to try another battery. This is definitely a weird problem.

vanlagan · #8 Post by **vanlagan** » Thu Feb 25, 2010 7:37 pm

Just tried the other battery that I have. Same issue. If it were yours would you try the inverter first?

#9 Post by **Harryc** » Thu Feb 25, 2010 7:42 pm

Well, it's a power issue. If you are docked the LCD works. On battery it does not. That tells me that there is not enough juice on battery to light the LCD. Yeah I guess it could be a marginal inverter, or something flaky with the power management circuitry on the board. Try an inverter.

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