T1700 SFF desktop. I bought off Goodwill in 2022 And had Windows 10 installed. I fired it up in 2022 and it was working fine. I had bought it for a backup. I forgot about it as I had it in the closet. I fired it up a couple days ago and now get "No boot device found press any key to continue" I checked the cmos battery and it was completely dead. I replaced the cmos battery with a new one. No change. Ran diagnostics in F12 . Everything passed. Looked in F2 also but don't really know what I'm looking for. I'm an old man with limited computer skills. Any help would be appreciated.