ThinkPad hardware maintenance manual is your friend http://ps-2.kev009.com/ohlandl/books/tpvol2.pdf

Be very careful. The plastics on those old IBM laptops is very brittle. I will be surprised if it survives shipping.
You will probably have to replace the battery for sure.
I have one of those IBM 755c thinkpads but the display went bad. You can still find refurbished displays on eBay.
Also those use special 17mm IBM hard-drives. I tried to use a CF card once but the thinkpad would not boot.
So I had to use and original IBM hard drive. I think that hard-drive is Incased in a plastic case.
You can pry open the case with a small screw driver.

I've had several old ThinkPads come in just fine... as long as it's packed properly, shouldn't be an issue. As for plastics, no they tend to be better quality than many other laptops from the time.

IBM kind of made these Hard-drive caddies tamper proof.
But you can pry one open with a small pick and screw drivers.
Don't break the tamper proof seal.

I think IBM designed these hard-drives to be replace-able with the caddy.
They are easy and quick swap-able.

IBM P/N's
125MB Hard Disk Drive 84G6663
200MB Hard Disk Drive 85G7606
360MB Hard Disk Drive 85G7608

Thanks for all of this information 😀 I really appriciate it. 😊

Intel486dx33 wrote:

Be very careful. The plastics on those old IBM laptops is very brittle. I will be surprised if it survives shipping. You will pr […]
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Be very careful. The plastics on those old IBM laptops is very brittle. I will be surprised if it survives shipping.
You will probably have to replace the battery for sure.
I have one of those IBM 755c thinkpads but the display went bad. You can still find refurbished displays on eBay.
Also those use special 17mm IBM hard-drives. I tried to use a CF card once but the thinkpad would not boot.
So I had to use and original IBM hard drive. I think that hard-drive is Incased in a plastic case.
You can pry open the case with a small screw driver.

I wanted to ask which CF card have you used and also which adapter ? 😊

I will try to use Sandisk Ultra II 2gb and 2.5inch latpop cf adapter.😊 I have seen one working with ide to sd card here : https://www.youtube.com/watch?v=E0ANCchZGZg 😕