On Thu, 15 Dec 2011 17:28:06 -0800 (PST), Robert Macy
wrote:
On Nov 17, 10:55*pm, Jeff Liebermann wrote:
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.
Thank you for the URL to eBay. The inverter PCB was identically
labeled to the one I removed and only cost $5, however, upon re-
assembly the screen is still dark.
Measure the inverter output voltage as above.
Make sure you don't have the keyboard video switch set for
external monitor only. On the T22 it's Fn-F7. Hold down
the Fn button, and tap the F7 button *ONCE*. Anything on
the screen? If not, tap the F7 button again.
Check the CMOS setup and make sure that the default display
is the internal LCD display, and not the external.
I've received blown LCD inverters in the past. That's why I
always buy two inverters. That's the risks of buying used
parts extracted from allegedly working units.
Remove the keyboard and look for the video connector. It's
a big fat cable coming from the left hinge and ending up on
the motherboard. Make sure the connector is properly seated.
Check the backlighting display settings in the Thinkpad
hardware manager application (I forgot what it's called).
On some versions, it's possible to set the display brightness
(also known as backlighting) to zero.
I have spare displays, but I don't think that's an option for
you to try.
Anyway, I tried a flashlight near the LCD screen and could see
nothing, no changings, like I expected something to be viewable.
Maybe stronger light?. not sure the screen is being updated at all.
It's difficult to see. Humor me and start over. Shut off the
laptop. Remove the AC power supply. Unplug the battery. Go away
for about 15 minutes to make sure everything is reset. Do *NOT*
attach the external monitor. Put everything back and turn on the
machine. Do NOT play with Fn-F7. Now, try the flashlight trick.
Culmination, so far is my first two experiences with eBay have been
excellent. Prompt shipment, with tracking numbers, sadly, USPS
screwed up badly and I did not receive the $5 Inverter PCB for almost
a month! Plus, the shipping company had to resend at their expense!
just not right.
I've had plenty of problems with USPS over the years. The other
carriers are usually much better. Be sure to complain to the USPS and
mention that they only have online delivery notification, not
tracking, making it difficult to find lost packages.
--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
#
http://802.11junk.com
# http://www.LearnByDestroying.com AE6KS