Hi,
I recently got a Toshiba T5200 Laptop (model PA8052U) from end of the eighties, fully working in nearly mint condition.
Now i want to put in a network card and i would like to change the cmos backup battery.
Already tried to losen a lot of screws on the backside but i was not able to open the casing.
Is there any chance to find a service manual for this good old piece online ?

Or does anyone have a hint how to open that device to get to the mainboard ?

Thanks and regards,
kultakala