@restorer-john What model Tecra is this? They made several models in this case design, A and S series. Going by 2008 I'm guessing A9 series? I am all too familiar with these chunky beasts, years ago I bought a whole batch of S10s as internet + word processing machines for our clients, and they do have great keyboards with some decent travel still. (Those had ordinary Intel 82567LM-2s for LAN, not sure why yours would have an issue. Should be recognized at least - maybe turned off in BIOS? Hmm, looks like Win10 drivers want at least a 82579 Sandy Bridge era chip, while the A9 would have a 82566MC with
"legacy" drivers up to Win7 only. Worth a shot, but don't be too surprised if you run into problems.) Pray that you never have to clean out the cooling system, I had a look at the service docs once and it seems you have to rip the entire machine apart for that. Stupid design. The Sanken OEM'd power supplies fairly commonly suffer from bad caps.
Toshiba still made another series of Tecras, the A11 and S11 models with Westmere era hardware based on an entirely different construction (OEM?), also quite nice machines and they seemed to ship with better power supplies. They pretty much gave up on this type of machine after that though.