Thanks for the information. The BIOS Version number shows your motherboard is in the D815 family. I guess the internal display doesn't work if the system doesn't have its device driver. The device driver is on the broken disk drive.
I have the remains of a TDS5104 SN B020452 with system disk drive. It came with a D810E2CB motherboard. The motherboard died from bad buck regulator capacitors in the CPU's core power supply. I replaced that motherboard with a D815EFV. It should be like the motherboard in your scope. The new motherboard boots from the original disk. When Windows Mellennium starts, the icons for Tektronix Apps are on the display. I don't know if the scope could be fully functional because the PC Interface board has a bad signal processing chip, IBM PowerPC405GB. In the eeVblog there's a thread from a guy who tried to replace that chip. At the end, he gave up and bought another board.
See the attached photo of my D815EFV motherboard installed in a scope SN B02xxxx aluminum back panel. Notice on the bottom right side, the LAN connector doesn't fit the hole the aluminum back panel. Does your scope look like this?
My D815EFV motherboard didn't come from Tektronx. It doesn't have a the tek BIOS with the tag that indicates it’s a TDS5000 series scope. It has splash screens displayed while the BIOS is setting up from Intel. Does your scope display splash screens from Tektronix or Intel?
My reason for the questions is, did your scope get a tek factory update to the D815 family motherboard or did some one local update the motherboard like I did. If the motherboard is a local update without the tek BIOS you may not be able to use OS Restore Disks. No tag no install; but when I look at my OS Restore Disk, I don’t see Install Shield so maybe it will install.
A reliable solution is to image a working disk and make a clone disk from the image for your scope. KEEP THE IMAGE. Making a writing the image, to a disk you will use as a clone, works well on a second computer with USB, preferably USB 3, via disk interface. See the pdf attachment for an example. I bought this gizmo on Ali Express, or eBay, for $12. There is no software required to connect the disk, plug your disk onto the gizmo and connect the USB cable to your computer. If the power drain of the disk is too large for USB, attach the included 12V wall wort. Your attached disk will show up in the ‘This PC window’.
You will need software to make an image and write the image to your clone disk. I use HDClone, I had to buy it. HDClone can write its image to disks with different numbers of cylinders and tracks. For Acronic, the numbers for both cylinders and tracks need to be the same or larger. Clonezilla is free and has resent updates, it may work but you have the same issues about disk type as Acronic.
I make images of all of my disk drives and file copies of the BIOS. The disk image I have for the TDS5000 system disk is ~3GB. I should fit on a DVD which I can snail mail to you.