Lenovo Thinkpad W520, No backlight after screen replacment

[eng.jaudat]

Hello friends,
i have a Lenovo Thinkpad W520 Laptop, the screen is broken, but the backlight still working.
when i replace the screen, there is a data without backlight, i can see thinkpad logo, but there is no backlight
i try to back the broken one to see if the light on it still working, but there is no light too.
i know there is a fuse in the MoBo now i should replace.
but what i need to ask, is there is a spicial screen should i install?
or the problem just happend because i try to replace the screen with presence of the battery?

thank you.

[ktmmotocross]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

offcourse it is because of connected batery

[eng.jaudat]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

thank you so much for replying.
so the problem just happen because the battery was connected while i'm changing the screen.
not because it need a spicial or spisific screen?
after replacing the fuse, if i connect a new random screen (not spisific for W520) it will work fine?

[ktmmotocross]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

that depends on what is damaged, but as your data work it may be just fuse or backlight switch or backlight driver, nothing serious

[eng.jaudat]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

the problem has been solved.
to help aother people whome face the same problem, my mistake is changing the screen while the battery installed.

just i replace a fuse near a flatt cable connector in the MoBo. and i replace the screen whithout any problems.

thanks for help

[mikejcks]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

the problem has been solved.
to help aother people whome face the same problem, my mistake is changing the screen while the battery installed.

just i replace a fuse near a flatt cable connector in the MoBo. and i replace the screen whithout any problems.

thanks for help

which fuse did you replace?

[mon2]

Re: Lenovo Thinkpad W520, No backlight after screen replacment

which fuse did you replace?

There appears to be 2 fuses linked to the LCD display. See attached.

Check for the presence of the voltage rails on each fuse.

Replace the one that is not passing the voltage to the LCD panel.

Not sure on their physical size but if you take and post a clear picture of these parts, perhaps we can figure it out. They look to be surface mount fuses (SMD).