The Perpetrating PC...
- MB:MSI Z77A-GD65
- OS:Windows 7 Pro
- CPU:Intel Core i5-3570k Ivy Bridge
- Memory:16gig G.Skill Ripjaw
- PSU:Cooler Master Silent Pro 700w
- HD:1TB WD Cavier black
- Rosewill rc-300e PCI Express x1 serial card
- VGA:(2) Nvidia Quadro FX 3500 SLI
- Monitor:24" Samsung
This computer is used to send G-Code programs to a Horizontal CNC Milling machine through serial DNC. Up until last week everything was working fine with the Rosewill serial card in the above machine. All of a sudden on Friday of last week all communications between the Horizontal CNC and the computer stopped. I asked the user if any updates had come down or new software was installed. The user assured me that nothing changed between the last time it worked and it's failure.
- Tried reinstalling the drivers (both with and without removing the driver first).
- Tried both the drivers on the CD that came with the Rosewill rc-300e card and the latest drivers online.
- Tried 3 different Rosewill rc-300e cards in all 5 PCIe slots (x1 and x16) on my MSI board.
- Tried reinstalling the OS on the PC.
- Tried 2 different Windows 7 computers both with Asrock Extreme 4 z77 motherboards and the Rosewill rc-300e serial cards. Neither worked.
- Tried connecting a different serial device (an engraving machine) to all 3 above computers (2 Asrock and 1 MSi) with the Rosewill rc-300e serial cards and all three worked fine. So it's not the ASrock or MSI PCs.
- I tried connecting the Horizontal to two old Windows XP Lenovo Thinkcenters with on-board serial. Those both worked fine talking to the Horizontal. So it's not the horizontal or its serial cable.
- So lastly I thought I'd try the Rosewill serial card in the Thinkcenter. That worked fine. So it's not the serial card.
Steps 6, 7 and 8 are what makes this whole thing weird. The only commonality that I can find is that it works with Windows XP but does not with Windows 7. BUT, it worked fine with Windows 7 prior to last Friday and absolutely nothing had changed on the PC (or any of the other Windows 7 PCs for that matter.)
Anyone have any ideas?