[Duo2400] dark screen

[Ben Smith]

> -----Original Message-----
> From: Duo/2400 List [mailto:DuoList at lists.themacintoshguy.com]On Behalf
> Of Russell Weiss
> Sent: Sunday, January 18, 2004 12:54 AM
> To: Duo/2400 List
> Subject: [Duo2400] dark screen
>
>
> I'm new to the list and am seeking advice.  I recently had my machine
> apart to upgrade the hd and ram.  However, when I re-assembled ( no
> screws left over !) the display was dark.  I could see a very faint
> trace of the desktop and know I was booting.
>
> I purchased another used display and unfortunately get the same
> behavior.   I had read that perhaps this was due to a bad backlight,
> but am hoping the display I purchased was not doa.   Any suggestions
> would be appreciated.
>
> Russ
>

It is probably not the backlight itself, but rather the inverter board that
drives it (or the power to the inverter board,) I am not a 2400 owner, but
from other PB's I would suggest that you first check the fuse on the
inverter board (unless the new screen was a complete assembly with inverter)
and then check the fuses on the motherboard (also if you can work out the
pin-out then check that power is getting to the inverter.)
Hope this helps,
Ben.