Sony GV-D1000 unit will not recognize memory stick have two units both memory sticks work in the good unit the bad unit says either no memory stick or memory stick error

You need a firewire cable.
Most likely a 4 to 6 pin unit unless the Mac has an 800 port, then use a 4 to 9 pin.

The 31 indicates a motor movement problem. The 10 indicates which one. I don't have the manual handy so I can't look up the specific motor movement that is wrong. These units are tricky to work on and are not DIY repair machines. Please seek an authorized service centor for this repair.

Dan

Hi
Is your memory stick detected by your PSP? If not, then there something wrong with the memory. Try out to insert it to other unit to be sure it will works, if it works then the problem is in memory socket. Try to clean it by using a used toothbrush with isoprophyl alcohol, and let it dry then put it back.
Hope it may helps...

Regards,
kaybicks

Sounds like an exit guide mis-alignment or a worn pinch roller.

Forget USB. Firewire is the best way to link to your Apple computer. Depending on the software your are using you will be able to control your Sony unit from your Apple computer. You could not do that via USB. Also firewire, or in your case i.Link is much faster. Just make sure you have a firewire port on your Apple and the proper software and you should be set. I hope to see your video's on Youtube! : ) Good Luck!

Are you formatting it with your computer or PSP?

1. Push the little HOME button on the bottom left of the face of the unit.
2. Use the arrow keys to move to the SETTINGS area, then move the up and down keys until you get to System Settings.
3. Once you are there, click on the "X" button and scroll up and down as needed to find Format Memory Stick. Click on "X" again to select that option.
4. The Sony PSP will now confirm that you want to reformat the memory stick (which removes every file and game save thereon, of course): choose yes and it'll format in just a few seconds.

It that doesn't work - try formatting it with your computer.

C:31:23 error code means problem is in Supply Reel section.
If you are tech person you might got the point.
Unit has mechanical problem in supply reel area and reel pulse is not being generated as supply reel table may be stuck due to back tension.
Let me know if you need further help.

launch video editing software...it should be able to see your deck. none of my three macs "recognize" the deck, but finalcut pro sees and can control the deck once it is connected and turned on

dead batt

It clearly states on Sony web site that only 32Mb PSP memory Pro will work with SJ20