From: "Dale A Cook" <os2-wireless_users@2rosenthals.com>
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Date: Thu, 07 Aug 2008 11:54:31 -0400
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To: OS/2 Wireless Users Mailing List <os2-wireless_users@2rosenthals.com>
Subject: Re: [OS2Wireless] TOT I think my T21 is dead
References: <list-2002961@2rosenthals.com>
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                                     Is this not os2wireless  & not  
wincrap  therefore should not here?  Is there a moderator or listowner  
here ?????
Dave Saville wrote:
> Update
>
> Thanks to  the guys over on thinkpad.com
>
> There is a generic problem with T20/21/22 known as BOD (Blink of Death)
> where on boot the lights just blink and zilch. Nobody really knows the
> cause but fingers get pointed at some regulator chips - Which are
> either unobtainable or only available in batches of 1000s :-)
>
> But I don't think I have that.
>
> I have completely stripped it down and rebuilt getting rid of some dust
> bunnies on the way but for a 7 year old machine it was very clean. Only
> had three screws left over :-)
>
> It no longer hangs with the screen on - just goes black but.... The HDD
> is still spinning and the left hand power led blinks. It will reboot
> with no problems apart from persuading it to actually power down. Lewis
> in particular will recall the Intel Pro card that caused this machine
> not to boot about a year ago. I noticed that when it stops the link
> light on the switch goes out. At this point the uptime is in the order
> of 20 minutes. I swapped the Intel with a 3Com but did not bother with
> changing the driver as all concerned think it is a power/heat problem.
> Dry joint or similar. This time it stayed up for around 3 hours before
> it stopped but now the link light is on! So this morning I took the
> card out and rebooted. So far it is still running after 7.5 hours.
>
> Of course the questions now are:
> Is it the supply to the mini PCI bay?
> Are those two cards bad in some way and what would happen if they were
> put in another Tpad?
> Are the PCMCIA slots on the same power bus? ie I might get away with
> using a WIFI card in there.
> If the PCMCIA slots do not provoke the problem, are there any ethernet
> cards about?
>
> A bit more info gleaned from thinkpads.com - With a bit of plastic
> hacking a T23 mobo will fit a T21 case. There are also known problems
> with this board but unlike T20/21/22 they are fixable. 
>
>
>
>
>