On Thu, 17 Nov 2011 13:45:42 -0800 (PST), Robert Macy
wrote:
The laptop boots up, beeps because the date is set to 1981 [can't see
the screen, backlight is OUT, just know the significance of the beep]
Conclusion SMPS works, laptop basically works. just no screen!
Plug in an external monitor into the "VGA" connector.
So following the T22 manual dissassembled down to the LCD screen,
could not see anything that looked like liquid and dried salts, so
don't know what's still wrong. Flushed with distilled water anywy and
will let dry. Will see later if that brings it back.
Sigh. When the laptop recovers from the baptism, turn it on, and
shine a flashlight on the screen. Can you see the image of whatever
it's booting? You may need to move the flashlight around to see the
image. If it's visible, it's probably the inverter. However, if it
comes on with an orange glow, it's the CCFL lamps in the LCD panel.
Is the 'inverter card' the ps for the backlight?
Yep. Google for "Thinkpad T22 LCD Inverter".
www.ebay.com/sch/i.html?_nkw=thinkpad+t22+lcd+inverter
About $6.00
is it touchy and blows easily?
Yep. If you short it out with salt water and it can blow up. High
voltage does funny things to sensitive electronics.
If I can find a way to remove the cap covers over the screws without
destroying the cap covers,
The screw covers are made from sheet plastic and held in with rubber
cement. Pound a very small flat screwdriver between the screw cover
and the plastic frame, and pry upward.
I'll take out the invreter board and look
at it to see if any obvious damage. Or ohm out the terminals on the
main switching transistor to see if it got toasted. Any ideas?
Find an AC voltmeter and measure the output voltage. For laptops, my
guess(tm) is about 500-800 VAC. Please remember that you have but one
life to give for your laptop.
Incidentally, the fan is often a problem on such Thinkpad laptops.
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558