T510 BACKLIGHT LCD OFF

[ruggero]

hello

I have a t510 with a problem at the lcd...i buy another lcd but i have the same problem.

you can see the problem here

https://drive.google.com/file/d/0BzvOqz ... sp=sharing

https://drive.google.com/file/d/0BzvOqz ... sp=sharing

So,i think the problem is or the cable or the fuse.

Do you know the position of fuse?

thank's a lot

[RealBlackStuff]

Usually the backlight fuse sits near the LCD-cable connector, and is a 3A/32V fuse, marked with a P.
It's tiny (ca. 4mm x 1.5mm) most likely green (or blue) in colour, and has only one letter printed on it.

Much enlarged, it looks like this (with a different letter):


To repair, solder a new fuse piggy-back style on top of the old one.
See also http://forum.thinkpads.com/viewtopic.php?t=119426

[ruggero]

ok,i find it and the buzzer of my tester don't work...so the problem is the fuse.

Do you know the size of the case of this fuse?I will buy a smd fuse but i don't know the size of case.

I can also use a direct bridgebut i think it may be dangerous

[RealBlackStuff]

This is the one that you need: http://www.newark.com/littelfuse/046600 ... dp/86H2954
The shown picture is with an N but you will get one with a P
The effective size is about 4mm x 1.5mm (I corrected above).
They should be available from any decent electronics company in Italy/Europe.

[ruggero]

first i upload two photos for help others with same problem...

http://i68.tinypic.com/2s80lch.jpg

http://i63.tinypic.com/1j3p1f.jpg


Are you sure that the size is 1,5mmx0,5mm? i think case is 0603 with size 1,6mmx0,8mm.

MOD edit: Pictures WAY too big, tags removed, read the Forum Rules, Section 5.

[RealBlackStuff]

Are you sure that the size is 1,5mmx0,5mm? i think case is 0603 with size 1,6mmx0,8mm.

I never said that.

Maybe you are reading inches instead of millimeters?