No keyboard on CP135C 486SLC CHIPS F82C836. \ VOGONS

No keyboard on CP135C 486SLC CHIPS F82C836.

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First post, by theelf

Posted on 2025-08-07, 16:10

theelf Offline

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Rank: Oldbie
Posts: 994
Joined: 2011-09-25, 19:39

Hi, grettings

I know how difficult will be but I ask here for any help

I buy this board assembled and designed in spain, a very nice 486slc chips mb

The problem is even keyboard for a moment look like is detected is not working. I checked all pins and is not a hardware problem

i think is something detect not connected and block the keyboard

any ideas? im stuck here

The attachment CP135C.jpg is no longer available

Reply 1 of 3, by Anonymous Coward

Posted on 2025-08-08, 00:30

Anonymous Coward Offline

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Posts: 5017
Joined: 2008-03-20, 05:37
Location: Shandong, China

You can do a quick check of the keyboard fuse. I see the marking 'F1' on your board near the keyboard controller, which is a fuse. Looks like it's removable without soldering.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 2 of 3, by Nunoalex

Posted on 2025-08-08, 14:46

Nunoalex Offline

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Posts: 143
Joined: 2023-02-13, 16:20

Maybe the keyboard is not working properly ? or it is not compatible ?
When the computer is turned on can you activate the "caps lock" or "num lock" do they light toggle on and off ?

good luck

Reply 3 of 3, by MikeSG

Posted on 2025-08-08, 15:50

MikeSG Offline

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Posts: 435
Joined: 2023-02-14, 08:31

Could try reseating the Fujitsu keyboard controller.

Do the keyboard lights flash, or nothing at all?

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