Even the correct cartridges are giving the error message "unsupported" cartridge". I had to move away from cartridge type printers. As far as a solution I don't have one for you. You could Google---> using an "unsupported" cartridge dell

Thanks to all who responded. Had posted on the LandzDown forum for help in getting rid of the virus which had resulted in the Dell computer misdirecting links, as well as not being able to obtain Windows updates. Computer was locking up as I tried to follow the Landzdown helper's instructions. After several hours of fits and starts (and a nap!), have just posted what was requested and am now awaiting the news. Regardless of the outcome, I would still like to have the option to do a complete recovery -- just as I've always been able to do on my Compaq/HP computers. Azinoh and Genes -- I had tried those options without success, but maybe it's because of the computer brand -- don't know. Seems like it should work. Might on somebody else's computer! LOL Owbist -- Afraid your instructions were beyond my capabilites. Don't know of anyone who has another copy of Windows (but then, my friends know even less than I do...). Went to the Dell site, started choosing all of of those relevant things I'd need, and realized I wasn't sure about half of them. Was going to download them anyway and hope I'd chosen correctly, but when I tried to register and was asked for a mandatory account number (and something else I've forgotten), I chose nothing after all. Better leave that route for somebody who knows what they're doing. (Are you available?? Ha) Jane - Haven't used instant messaging in years and, frankly, didn't see that on Dell's site. If I were able to just type out and post the problem like on a regular forum, I'd be more comfortable. I may do what you suggest, though, if the virus problem gets healed. I need to know how to do a recovery! It's always been a great, though time-consuming, safety net when all else has failed. Much appreciation for all of you taking the time and thought to help.

It's not the "light source", it's a bad part on the circuit board.. (or possibly the display itself or the connections) The part may be cheap, but knowing which one to replace may cost you ...

Have you tried all of these: Unsupported Cartridge Error in DELL printers (29/09/2009 @ 16:39:55) The "Unsupported Cartridge Error" message may be familiar to you if you are an unlucky dell printer owner. This message seems to be quite a common issue and is not confined to remanufactured inkjets but is just as big a problem with original Dell printer cartridges. It seems from looking on various websites and forums that this is a common problem with Dell inkjet printers and especially prevalent in printers such which take the M4640, M4646 and 592 printer cartridges (All In One 922, 924, 944 etc). Here are 3 ways to try and resolve your Dell Unsupported Cartridge error message. 1, Run the printer's clean cartridge printer cartridges function. This should be found within your printer's menu system. You can find a full description on how to do this on your Dell printer manual. You can find them at the Dell printer support website. 2, Clean the contacts on the top and back of the cartridge with filtered water (bottled water is great for this). Always use a lint free cloth so that the contacts will not pick up particles or fluff. 3, Download the latest drivers for your particular Dell printer. If you are up to date, it may be worth uninstalling your current driver and reinstalling a new one. You can find all Dell printer drivers here. ** Me again... Another suggestion I saw was to place the black cartridge in the colour cartridge slot, or vice versa.** Here is a link that might be useful: Dell cartridges