There was no SE/40 made by Apple, only an SE and an SE/30. The "30" in the model name refers to the 68030 processor. If you have something called an "SE/40" I would assume someone has added an aftermarket 68040 processor upgrade to the SE/30 PDS slot and renamed it. Can you post some pictures please?
In any case, the CRT in the SE/30 will be the same. Remaking it into a monitor will not be easy, as you can see by searching these forums for threads where it has been discussed before. The majority of the information (timing, levels and scan rates) are the same for all B&W compact Macs; there may be some small differences to the location of cabling.
In any case, the CRT in the SE/30 will be the same. Remaking it into a monitor will not be easy, as you can see by searching these forums for threads where it has been discussed before. The majority of the information (timing, levels and scan rates) are the same for all B&W compact Macs; there may be some small differences to the location of cabling.