Hi...I have a Crucial M4 SSD that is not being recognised by my mid 2009 MBP. When I run the Lion boot up program no drive is shown at all. I can swap the original HD back and all works fine. Crucial support told me that I needed to do this:- "In most cases, your SSD can be returned to normal operating condition by completing a power cycle. The process will take approximately one hour. 1. With the SSD installed, power on the Mac and press the Option key to enter the Startup Manager. 2. Leave it on the Startup Manager screen for around 30 minutes without using the Mac, then power off and disconnect the SSD altogether. 3. After 30 seconds, reconnect the SSD and repeat steps 1 and 2 again. 4. Power off, take out and reconnect the SSD and power back on. After the above steps, the SSD should be detected in the Mac again. If you do encounter any issues with this, or if you need any additional assistance or advice, please do not hesitate to contact us. Kind Regards, " However...this doesn't do anything and all I am left with is a blank grey screen. What is worrying as well is that the original HD has four small screws that keep the drive locked in place but the SSd doesn't have any screws at all and so the SSD is loose within the MBP. Can anyone help me out or is the drive DOA?