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richk
Posts: 1,498
Registered: ‎01-01-2010
Location: San Francisco
0

Re: T400 motherboard replacement advice needed?

[ Edited ]

See my note above about high temperatures. You need at least a quartz preheater and a good rework station (plus steady hands).  The bigger fuse (3.18mm) is Littelfuse 433003 (3 amp, 32 volt).  The smaller one (1.6mm)  is Littlefuse 434500 (.5 amp 32 volt).  I don't know a good source. Sometimes they are available at Mouser.com.  I use organ donor boards if I fix them.

Community Moderator
zoltanthegypsy
Posts: 2,529
Registered: ‎01-13-2008
Location: Bainbridge Island, WA, USA
0

Re: T400 motherboard replacement advice needed?

[ Edited ]

Is there enough room to do something really tacky like bridging the blown surface-mount fuse with a leaded one? (leeeeeded, not led-ed)  Using low-temp non ROHS solder?

 

Pretty shade-tree, but maybe in an emergency?  Kids, don't try this at home.  I'm asking, not saying...

 

Z.

R40 XP Pro + Linux + Solaris, T43 XP Pro + Linux + Solaris, T61 XP Pro + Win 7 + VMs, T400 Win 7 Pro 64 + too many VMs to count, New T420 - a work in progress ... GeezBlog

Guru
richk
Posts: 1,498
Registered: ‎01-01-2010
Location: San Francisco
0

Re: T400 motherboard replacement advice needed?

There is room
Fanfold Paper
x_merlin_x
Posts: 13
Registered: ‎12-30-2008
Location: Munich, Germany
0

Re: T400 motherboard replacement advice needed?

Hi richk and everybody,

 

I am having a similar problem with my T500. Backlight not working while everything else is fine. I seem to have blown it during the replacement of the magnesium display frame.

 

Where exactly can I find the fuse F7 labeled as a P. I have removed the keyboard and the front plastics. Do I have to remove the bottome plastics as well?