Recent content by gleegum

After some months waiting for the RTC chip (I bought a failed one on ebay), the machine is up and running again. Thanks

No, I don't have one. Anyway, I think I'm gonna source that RTC chip + the crystal as it's really cheap. I'm gonna report back when it gets replaced. To reach the RTC in this machine, you need to almost completely tear it apart, including the screen. Thanksss

Thanks for your very helpful reply. Today I inspected the battery area as suggested and I found some corrosion on the RTC chip, which is indeed an MC146818. I've removed it to inspect the traces underneath, and they seem a little suspicious, but upon testing them for continuity they checked ok...

Got this machine that was working fine, but after a reboot it gave me this error: "RTC int. error". It stays on this message and doesn't boot. Checking the maintenance manual it appears to be a "RTC INTERRUPT ERROR". I've no idea what this mean, but checking the manual it says just replace the...

Is there an IBM branded mouse for this machine? I'm looking online for a serial mouse for an XT, but I can't find an IBM serial mouse, just PS/2 ones or from other brands. Which mouse would be a period correct one? thanks

I'm looking for this part, if you have one pm me please. Ship to Miami, thanks

I did some test in individual components like 74xx chips and they weren't shorted. So I didn't found any shorts in this rail (5v?) I'm assuming there's a 12v rail also, not sure where to test. There's no much info about fixing this machine, service manual says just replace the entire board...

I have this L40SX that appears dead. The display and the small display indicators are the only signs of life, the display backlight turns on and I can control the brightness, but that's all. The rest of the machine looks dead, no chips gets warm, no sound, nothing. I'm using a modern power...

I have this 5160 with a WD1002A-WX1 HD 8 bit controller card and a ST-4096 drive. I would like to add a gotek drive, but I'm not sure if it's possible to install it with a 16 bit controller card. I have the cards available in the photos below, they are both HD and FD controllers. Model are: a)...

I recently got a external mitsubishi parallel port floppy drive model: MF355H-332MR. I'm trying to use it under windows xp or windows 98se, or DOS 6.22. Does it need a driver? I can't make it work. I didn't find much info about this drive. Thanks

I see now, it's not the original motherboard, but the case is the IBM one together with the keyboard. So no Cassette BASIC on this ROM right? So probably as Eudimorphodon says. thanks!

I got this machine with a missing floppy drive, but with a ST238R hard drive and controller. It gives me disk error, so I removed the hard drive controller card. I thought the machine would boot into cassette basic when it didn't find any drives, it just get stuck in the error saying "any key to...

These are the best photos I could get, the flex looks pretty damaged, with the naked eye it didn't seem that bad. Hard to repair right?

Hello guys, I want to install an ST-238R Hard drive in an IBM 5160. I got this machine in a non working state, and with the help of this forum I was able to repair it (shorted cap). Now the machine is working fine, floppy drive is ok. It came with the hard drive mentioned above and a...

Hi, I got this IBM PS/2 Model 25 Type 25-S01 that can't read floppies. Somebody installed a hard drive on it, but I had to remove it since it was not working. I've cleaned the floppy read/write head with isopropyl alcohol, it was pretty dirty, also lubricated the rails, etc. After the machine...