Computer not recognizing player

Your 4GB card is actually a microSDHC card. The e250 works with microSD cards, 2GB and smaller.

follow this steps, and use the common sense.God bless you
If the player skips, make sure that the DVD disc is not dirty or scratched..Use the cleaner disk buy it from R. Shack.
If the tray won't open or close properly, check the belt for dirt or wear. Then check the tray for misalignment. If needed, remove, clean, lubricate, and reinstall the tray following the instructions in the owner's manual.

tried to clean with a cd lens cleaner if can not resolved with cd leaner just let me know.

Go download EASEUS Partition Master 5.8.1 Home Edition (free). I've found it very useful to check and often repair drives that won't mount.

Is this the first time you've connected it?
Did a data CD come with the camera? Still got it?
If so, insert it into the computer and follow the on-screen instructions that should soon appear.
This is loading an 'operating driver' for the camera to be 'recognized' by the computer in all future use.
Alternatively, remove the camera memory card and put it in a card reader, a device available very cheaply from five & dime stores upwards (or Poundland if you're in the UK)
This will be recognized instantly by an USB 2.0 and upwards connector on a computer.

A camera that works connected to a TV without software is not the proper device to connect to a computer. Check again with your packaging and instructions.
Having a camera working on the computer and then porting the video signal to a TV monitor is the preferred arrangement.
Install the software, reboot, then connect a PC camera, it should be recognized and be testable on Skype, etc.

Depending on how long you've had the player, the batteries may need replacing.

I have seen a problem where the computer would not recognize the player and would not charge it, however.

First, I recommend trying to charge it directly from the computer USB port (not the hub) if possible. If that doesn't help, try reinstalling the software for the player to see if the computer will then recognize it and allow charging.

If neither of these fix the problem, it's probably time to replace the batteries.

Good luck!

Do a google search and see if you can find a free download of your manual. Had you connected your player before? Could your computer read your player before?

My computer doesn't recognize my MP3 But, I can connect it like it is an external drive with no problem.

The first time I tried to restore the firmware in my Pearl it would not recognize it. I had to follow all the troubleshooting instructions that popup when you run the software. Basically, try taking the battery out and waiting 10 seconds or so. Run the software and read all the instructions at the bottom of the popup window. then hold the play button, plug your player in, and keep holding that button until the software recognizes it. It works.

format the player from the player ( set-system menu) not from the computer. pull the battery from the player and leave it out for 15 minutes.
reboot your computer. put the battery back in the player.
plug it into the usb port on the computer. worked for me