Hello. I have an HP Z440 that the slim DVD drive was rarely used. I would say it maybe saw less than 2 hours of actual read/write use before the machine was recently retired. I inherited the 440 and am in the process of trying to get it set up for home use which is becoming more work than expected as everything on all drives was wiped clean and it is a RAID setup which I normally do not deal with at all. Anyway, I am trying to install Windows on it, and the stock slim DVD drive works sporadically, and when it does work I have to push the already closed door in to get the drive light and drive itself to work, and this sometimes does not even help. I have checked all connections and they seem fine. I realize that the drive is older, but has been in a clean, climate controlled ofc its' whole life, and again hardly used. Am I missing something, or is this drive trash. Also, does it need to be the exact same 9.5 mm DVD drive or will any slim drive work? Thanks in advance.