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blown X40

X2/X3/X4x series specific matters only
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ggiglio
Posts: 38
Joined: Fri Sep 24, 2010 12:35 pm
Location: roma, italy

blown X40

#1 Post by ggiglio » Thu Nov 16, 2017 4:13 am

Hi all,
I'm just in the middle of modding my X40 with a CF/IDE adapter (Adaptec) and a Sandisk Extreme III card to replace the (in)famously slow hdd.
I've (hopefully) solved the removable/fixed issue of this kind of compact flash, but, while reinserting the adapter I misplaced it :(
When I fired up the X40 it gave no sign: no action at all, no light up, either on battery or on ac power, even with the hdd slot empty. Blown fuse ? which one ? how to find it ?
Can someone help me to bring X40 back to life ?

cheers and greetings from Rome
Ggiglio

RealBlackStuff
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Re: blown X40

#2 Post by RealBlackStuff » Thu Nov 16, 2017 9:32 am

Lovely day for a Guinness! (The Real Black Stuff)

Check out The Boardroom for Parts, Mods and Other Services.

ggiglio
Posts: 38
Joined: Fri Sep 24, 2010 12:35 pm
Location: roma, italy

Re: blown X40

#3 Post by ggiglio » Thu Nov 16, 2017 2:18 pm

thanks a lot RBS :)
Do you think it's ok to solder a low ohm resistor (say .1 ohm) on top of the blown one ?

NonesensE
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Re: blown X40

#4 Post by NonesensE » Thu Nov 16, 2017 2:39 pm

No! A resistor isn't a fuse! Either it won't save the board in case of a shortcut or it will affect the voltage on the parts that get their power through the resistor, probably causing them to malfunction.
Solder a fuse on top of the blown one. You can get fuses e.g. from a broken motherboard.
Sometimes coming over from the German forum...
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kfzhu1229
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Re: blown X40

#5 Post by kfzhu1229 » Thu Nov 16, 2017 3:16 pm

You can also do a smoke test by connecting the fuse with wire by hand first and disconnect as soon as you discover something is wrong. If everything went alright, and you don't have a dead motherboard, you can cover the fuse with solder, if you are sure that you won't mod this motherboard again.
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ggiglio
Posts: 38
Joined: Fri Sep 24, 2010 12:35 pm
Location: roma, italy

Re: blown X40

#6 Post by ggiglio » Fri Nov 17, 2017 6:17 am

ok, my fault ! :oops:
I have an old thinkpad A21p who is too tired to work, so maybe I'll spot an unused, still intact fuse on its mobo (provided the required current doesn't exeed its limit).
So, first of all I have to locate the blown fuse (tnks to RBS for the schematics), then I'll connect an ammeter in parallel to measure the power drain, then I'll fire up the X40 keeping my fingers crossed.
If (and only IF) the current flow appears correct (say 1.0 to 1.5 A, that is 12-15 W for the whole machine) I'll install the "new" fuse on top of the blown one.
Otherwise I guess switching the mobo is the only way to go...

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Re: blown X40

#7 Post by RealBlackStuff » Fri Nov 17, 2017 7:04 am

If all else fails I could always sell you my X41T tablet version with 60GB HD and XP. :)

ggiglio
Posts: 38
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Location: roma, italy

Re: blown X40

#8 Post by ggiglio » Sun Nov 26, 2017 5:41 am

just an update on the ongoing work....
ok, got a day off, carefully disassembled the X40, taking note of (almost) any single bolt and extracted the mobo.
Helping myself with a magnifier glass I thoroughly inspected every inch of it, but found no evidence of blown fuses :(
Still on the workbench I decided to fire up The X40 for a last goodbye, and...the leds turned green, bios screen suddenly came out from the dark !
Then I repacked all the stuff, run the sandisk cfg utility and installed a fresh copy of XP.
Now the X40 takes 24 seconds to boot to desktop and runs with 4 Gb cf card + 64 Gb of sd data card.

I'm still wondering about what *really* happened. Maybe an electrostatic build-up that froze the machine, an electro-magnetic pulse from a hidden ufo, I'll never know :?
btw... while I was working there *surely* weren't any blackout...

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