Purchased an Optiplex 7040 for a client in need of a POS system. Installed a video card, 2 x Samsung 500GB SSD's in RAID1, Windows 7 Pro and Dell drivers. The machine was returned to me a total of 3 times because of random freezes, no response from keyboard, mouse or power button. Passed all diagnostics. Replaced the video card, memory and drives. Finally had Dell replace the motherboard yesterday. Clean install of Windows 7 on a single SSD, installed drivers and left it running all night (power settings changed to not allow sleep). System was frozen this morning. The PSU and CPU are to only two components not replaced. I'm going to try installing Windows 10 next.
The machine is long past the 30 return window. I've given the customer a new computer, now I'm stuck with a $1000 POS that isn't working right.
Thoughts or ideas?