[Kip whyde]

I have an EZpath that I've been trying to sort out since I picked it up last year. I had an earlier post where I detailed my struggles to this point.

https://en.industryarena.com/forum/n...e--463883.html

I've swapped the old HDD out for a new SSD like was suggested in the previous post, and changed the FDD to a Gotek floppy emulator. No matter how much I tried, I couldn't get the SSD to work in the machine. I ended up using another PC and loading DOS and the EZ Path software onto the new HDD that way.

The problem I'm having now is when I boot the machine with the HDD, I lose all signal to the monitor/keyboard. Without the HDD hooked up, I can boot into the BIOS/CMOS setup menu. I don't think it's a software issue with the new HDD because it did it before I loaded DOS/EZ Path on it also. I'm wondering if there's a BIOS setting I'm missing. The ebay ad for the HDD said to set the computer BIOS to "No UDMA/DMA on only 512mb" but I can't find those settings in the BIOS menus anywhere.

My other thought is a motherboard/backplane issue. I've checked the power going into the backplane from the power supply and I have 11.4/5.2v going in, not sure if this is adequate. I just need some guidance on the next step.

[bptcontrols]

Trying to get old and new mb, hd, etc to all work together rarely successful. If screen go blank after bios screen the DOS startup is crashing. PC/bios typically not work w SSD regard less of adapter; only works with IDE HD. PC hardware tech is not necessarily backward compatible. Need a complete update to 'new' pc; HD/DOM w IDE.

Note not all PCs are compatible with BMDC controller. This would be evident if DOS starts and machine start fail. A moderate performance single board computer that runs DOS is sufficient. There are several places offer complete replacement kits, (backplane, sbc, DOM w software installed) guaranteed to work. Install in 15 min; done, get to work.

One other issue if DOS boot works but machine fails to start is BMDC may need upgrade: not compatible with new pc, its an ISA bus timing problem. To check compatibility look @ BMDC card next to ISA edge connector, the big square chip must be Mach435. If it is a 435 then BMDC failed.

ex bpt controls
(last factory guy standing)