I'm missing the slide tray for my Dimage Scan Dual IIl Would like to find one to buy.

You can find it here.

Konica Minolta Photo Imaging Europe GmbH DiMAGE Scan Dual IV

You should read the Owner's Manual. Download it from here:
Minolta DIMAGE Scan Dual III Owner's Manual (English)

Found trays in real time from previous owner...

Are you doing index scans or prescans? Sometimes the software gets funky - try doing at index scan if you are doing prescans, and vice versa. Also try CHTL+SHIFT+I which is a recalibration (don't that will do anything but it can't hurt). The best thing might be to just remove Dimage totally (you may have to delete the main folder if you've created any Jobs) and then reload the software. Before you do that, update your virus software, do a system check, and maybe some maintenace like a Defrag - then reboot, remove the software, reboot again and reload software.

Forget about the Minolta software. It's buggy at best. Use VueScan instead. A free trial is available so you can test it before you commit to buying it. Available for Windows including Vista.

http://www.hamrick.com

Use VueScan instead of the Minolta software. A free trial is available so you can test it before you commit to buying it. Available for Windows Vista.

http://www.hamrick.com

Use VueScan. A free trial is available so you can test it before you commit to buying it. Available for Windows and Mac.

http://www.hamrick.com

1) Install all of the usual Minolta software in Vista.
2) Create a new folder somewhere
3) Create a new txt file named minolta.inf and paste this into it:

; scanners.inf -- Test Vista Minolta Film Drivers
;
;
; To remove this driver and install the original
; manufacturer's driver, go into Device Manager,
; open Imaging devices, then click on the scanner name
; with the right mouse button and choose Uninstall.
[Version]
Signature="$CHICAGO$"
Class=Image
ClassGUID={6bdd1fc6-810f-11d0-bec7-08002be2092f}
Provider=%Provider%
DriverVer=3/12/2009,2.0
[Manufacturer]
%Mfg%=Models,ntamd64
[Models]
; USB scanners
"Minolta Scan Dual II" = USBScanner,USB\Vid_0638&Pid_026a
"Minolta Scan Dual III" = USBScanner,USB\Vid_0686&Pid_400d
"Minolta Scan Dual IV" = USBScanner,USB\Vid_132b&Pid_000a
"Minolta Scan Elite 5400 2" = USBScanner,USB\Vid_132b&Pid_0012
"Minolta Scan Elite 5400" = USBScanner,USB\Vid_0686&Pid_400e
"Minolta Scan Elite II" = USBScanner,USB\Vid_0686&Pid_4004
"Minolta SC-110" = USBScanner,USB\Vid_0638&Pid_0a15
"Minolta SC-215" = USBScanner,USB\Vid_0638&Pid_0a16
;---------------- Duplicated from [Models]
[Models.ntamd64]
; USB scanners
"Minolta Scan Dual II" = USBScanner,USB\Vid_0638&Pid_026a
"Minolta Scan Dual III" = USBScanner,USB\Vid_0686&Pid_400d
"Minolta Scan Dual IV" = USBScanner,USB\Vid_132b&Pid_000a
"Minolta Scan Elite 5400 2" = USBScanner,USB\Vid_132b&Pid_0012
"Minolta Scan Elite 5400" = USBScanner,USB\Vid_0686&Pid_400e
"Minolta Scan Elite II" = USBScanner,USB\Vid_0686&Pid_4004
"Minolta SC-110" = USBScanner,USB\Vid_0638&Pid_0a15
"Minolta SC-215" = USBScanner,USB\Vid_0638&Pid_0a16
;---------------- USBScanner -------------------------
[USBScanner]
Include=sti.inf
Needs=STI.USBSection
SubClass=StillImage
DeviceType=1
DeviceSubType=1
Capabilities=0
[USBScanner.Services]
Include=sti.inf
Needs=STI.USBSection.Services
[Strings]
Provider="Konica Minolta"
Mfg="Konica Minolta"
4. Save file. Turn on scanner and go into device manager and update the old minolta driver with this driver. You may have to manually update it.
5. All the normal Minolta programs now work just fine. Enjoy!

Not sure if this will fix it, but there are a bunch of metal tabs on each rail (that the holder goes into) that (I believe) are contacts that help the scanner to determine where the holder is. They get bent very easily. If they are, bend them back carefully.

You sort of have to look "up" into the scanner with a flashlight to see them on each side.

  I JUST SOLVED THIS PROBLEM! These people are right you do have to reinstall the software but it was much more complicated.  Using spotlight, which is the the little magnifying glass in the upper most right hand corner of your screen you have to search for and delete a bunch of things that are not in the folder in applications but in documents instead. Anyway, I searched the words "Dimage", "dual", "Konica", "Minolta", "scan" and "idh". The idh things are some kind of plug-ins (I think). I warn you, all of these words brought up random stuff that should not be deleted (mostly images but also some documents) . Be careful, when I typed in the word "scan" over 600 items came up and it was hard to separate what was photoshop related and what was scanner related. Once you get rid of every file related to the scanner, restart your computer. Then reload the software and restart your computer again. After this the scanner should fire right up and the light will stop blinking. I was able to scan a tray of slides and a strip of negs too. One more thing. Don't forget to "dump your trash" before you restart your computer for the fist time Even things in the trash will stop it from opening. If it doesn't work you probably just missed a file somewhere.