R51: Inverter or backlight (LCD)

R, A, G and Z series specific matters only
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channum
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R51: Inverter or backlight (LCD)

#1 Post by channum » Sun Nov 06, 2005 10:00 am

I'm about to puke, 4 months out of warranty I find myself typing this on a rather old CRT monitor because my Thinkpad's display is non-functional...

The symptoms:

Yesterday afternoon the monitor started to flicker and dim and then just went dark.

The LCD monitor itself is still 100% functional, with bright enough light you can still see the screen if I have display routed there.

If I put it to sleep or reboot I'll get about 10-30 seconds of backlighting before a quick flicker fest and darkness.

Are there any real chances these symptoms are from a bad inverter or even just a cable seating? I am willing to spend the $100 or so to replace the inverter but am not going to drop $600 to replace the whole LCD display when for not much more I could get a whole new desktop system complete with a 19" flatpanel LCD. I am finishing grad school in 6 weeks and this is the second laptop to die on me. At least this time I'm left with a funny looking desktop instead of a $1000 external drive.

beeblebrox
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#2 Post by beeblebrox » Mon Nov 07, 2005 3:38 pm

There are 2 potential causes.
1.) the stupid cable broke (happened to me, just reverse... I had to wait 10 Minutes for the light to appear)
2.) inverter failure (highly possible because it dims first and then goes out)

kyrotech
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#3 Post by kyrotech » Thu Nov 10, 2005 12:09 am

or 3) LCD is damaged, kiss it goodbye.

Also, once I saw a similiar problem with a T40, for some reason the LCD cable was not 100% properly connected to the LCD....

you can buy 1) and 2) and will be as cheap as $50. 3) prepare the nice $400 + check :twisted:
IBM ThinkPad T42 CTU # Pentium M 1.8 Ghz Dothan # Mobility 9600 64 MB @375/240 # Hynix 1024 MB PC2700 RAM #
Fujitsu 80 GB 5400 RPM # LG CDRW/DVD Combo Drive # Intel Wireless b/g mPCI # TFT 14.1 XGA Display # WinXP Pro SP2 Catalyst 7.7

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