Are you getting proper isolation from the 2 screws holding the 5 battery
contacts and the stiffener?
If not, here could be a severe drop in voltage to a key place on the mobo.
Just one place to look.
Jack
----- Original Message -----
From: "Mark A. Kippert" <[EMAIL PROTECTED]>
To: "Duo/2400 List" <[EMAIL PROTECTED]>
Sent: Friday, July 06, 2001 10:04 AM
Subject: [Duo2400] 280c w/2300 motherboard acting funky
> Hi all. Here's a problem I find quite baffling. Sorry it's a long post but
> loaded with details.
>
> I just picked up a Duo280c from a guy along with some other stuff. He said
> sometimes it would boot if you pressed on the right side around the hinge
> however it wouldn't for me. It has been setting for quite some time.
>
> When I got home I tried to start it from AC and no battery. Nothing. So I
> stuck it in my Duo Dock. I got the strangest startup tone. A strobing
sound.
> As if the startup tone were in slow motion and playing through a fan
> (remember doing that as a kid, going aaaaaaaaaaaah into a fan ;^). Did the
> usual stuff like reset power manager etc. I left it in the Dock over night
> to charge the PRAM. Tried a good battery from my own 280c.
>
> It will not boot and there is no light from the screen. Only the strobing
> startup tone.
>
> Anyway, I disassembled it and discovered that it has been upgraded with a
> PPC2300 motherboard! I pulled the RAM (36MB!) and tried it. Still strobes.
I
> pulled the screen, modem, hard drive (SCSI) and after each I tried it.
Still
> strobed.
>
> I then put the motherboard, by itself, into a different bottom and used
> another chassis (frame, stiffener). I stuck it into the Dock and it booted
> from an OS7.6 disk tools floppy!
>
> However when I tried to launch drive setup, it locked up. I shut down with
> the power button on the back. I then hit the power key and got that
familiar
> strobe. POOH!
>
> Time to play hard ball!
>
> I pulled the top off my Dock.
> I plugged in the motherboard all by itself. It boots just fine.
> I connect the RAM. It boots just fine.
> I connect the SCSI hard drive. It boots just fine.
> I launch drive setup and Simple Text. No problem.
> I connect the modem card. It boots just fine.
> Everything seems to function normally.
>
> Then I put everything back into the bottom plastic with the chassis
> (installing the screws to hold it together just as before), insert it into
> the Duo Dock hit the power button...STROBE SOUND AGAIN!
>
> I tried variations of the bottom plastic (I have 3 of them) and chassis (I
> have 3 of them). Same strobe.
>
> I'm totally baffled. All suggestions will be most welcome. Thanks!
>
> -makmac
>
>
>
> ----------
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>
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> Need help from a real person? Try.
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>
> ----------
> Dr. Bott | 10/100 Ethernet for your 2400 is finally here!
> MPC-100 | <http://www.drbott.com/prod/mpc100.html>
>
> NineWire | If they are cool enough to host this list...
> Digital Solutions | ...you should check them out! http://www.NineWire.com/
>
> Midwest Mac Parts ][ <http://www.midwestmac.com>
> After-market parts for Macs. ][ 888-356-1104 ][
>
> MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879!
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----------
Duo/2400 List, The friendliest place on the Net!
A listserv for users and fans of Mac subportables.
FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml>
Be sure to visit Mac2400! <http://www.sineware.com/mac2400>
To unsubscribe, E-mail to: <[EMAIL PROTECTED]>
To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]>
Need help from a real person? Try. <[EMAIL PROTECTED]>
----------
Dr. Bott | 10/100 Ethernet for your 2400 is finally here!
MPC-100 | <http://www.drbott.com/prod/mpc100.html>
NineWire | If they are cool enough to host this list...
Digital Solutions | ...you should check them out! http://www.NineWire.com/
Midwest Mac Parts ][ <http://www.midwestmac.com>
After-market parts for Macs. ][ 888-356-1104 ][
MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879!
Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
