Used similar hardware as Pico in above thread:
"1 x thin client HP T5710 - I'm using a T5720
1 x 500GB 2.5" SATA HDD - using Brand new WD
1 x SATA to PATA adapter
1 x 44pin to 40 pin IDE cable"
Ok so initially I tried to install Windows Home Server (WHS) but it wouldn't initially install - error when starting to copy files to HDD. Solved by first formatting HDD to NTFS in external dock then trying again.
My main issues arises when I switch off the unit and close up the case (which up to this point has been open, disassembled the entire time) the OS won't boot despite just having rebooted after install completion.
Later on I discover if the case is open everything works, if case is closed = NTLDR.exe error. Simple and effective remedy is to open case and reboot.
At this stage I need to do some more testing, so I wipe the HD and proceed to install XP PRO. Exactly the same thing happens. XP PRO install begins, then when it tries to format partition it can't. Turn off, open case and repeat. Install goes ahead full steam.
It appears that a hardware issue is caused by the closing of the case. IDE ribbons contacting somewhere they shouldn't? Adaptor being pushed down by ribbons severing connection?
Have a series of photos that attempt to show how things look internally as case is closed up.
What could be going wrong?