Marvin, I am also a collector of old powerbooks. I have over 60 including a 2400c. I also have one of the original 1984 macs model m0001. sounds like you have a ton of accessories for your 2400. I had to get mine from Japan because I couldn't find one in the US at the time. your hard drive is bad. get a new laptop IDE hard drive and replace it. they sell cheep ones on ebay. you need an ata-5 (not ata-6) 2.5" drive. Hard drives only last so long. I have had several bad drives in my laptops. My 2400c sometimes doesn't want to boot because its hard drive is going bad. Some of my collection is online at www.ryonix.com/powerbookmuseum I haven't updated the site in a while. I have been debating selling my collection to get back some of the shelf space in my house. anyway good luck.. -I am a collector of old Mac's and powerbooks. -My prize is a 2400c. I have everything that was ever made for it. It has been working fine but it will only give a clicking sound when trying to boot. -Is there a still a repair service available anywhere? -Marvin Weide