eGPU no longer works with T420- Need help

I'm running a GTX465 on a Lenovo Thinkpad T420 with Windows 7, 8GB RAM, connected through PE4H and E2C2. I've been running this setup with relatively few problems for about a month. I typically boot by turning the eGPU on, plugging in the express card, and turning on my Lenovo. A few days ago, I hit the power button on the T420 to go into hibernate. When I came back, I was unable to get it to return for hibernation. In an attempt to get a response, I'm pretty sure I yanked the express card (rather stupid on my part), but still couldn't get anything to come up and was forced to power down by holding down the power switch. When I tried to turn it back on, my PC would not pick up the eGPU or show up on my external monitor, even when I used the same process as before.

I un-assembled and re-assembled the eGPU setup to make sure all the cables were connected properly. There are no problems; the GTX465, PE4H, and power suppy appear to be working fine. Still, the eGPU wouldn't be detected on start-up.

Today, I tried plugging in the express card of the running eGPU during the Windows boot sequence, rather than before. To my surprise, it worked! My eGPU was back up and running.

Then, however, I decided to download, install and play the latest Beta of Hawken. After installing, I ran the client, which loaded and then immediately crashed. Both my screens were black and totally unresponsive. Again, I yanked the express card (I really should stop doing that) in the hopes that something would come up on my laptop monitor. Nothing did, and I had to hard reset again. This time, Windows ran a rescue process when I booted back up, and I hit okay when asked to run something that would revert to an older state of Windows. Now, my eGPU is again not showing up, regardless of when I plug the express card in. Any ideas on what I should try to do?

It may be worth noting that my express card slot is not secure. The spring loading and unloading works, but when the express card is in what it supposed to be the "locked" position, I can still pull it out without too much force. Could this be the issue? I know that the express card itself works and is getting info, though. On the PE4H, there is a red light on when the E2C2 is not plugged in. When it is, the light turns green.

 

PROBLEM SOLVED. All I had to do was update my NVIDIA drivers.