Originally Posted by e-ink
Try rupor's rescue image
by extracting its "OS Firmware" folder to the root directory of the SDCard. Then boot that image by switching on the reader while pressing Home+Menu until progress bar reaches 100%.
You now should have both serial and partition access from your PC.
This image btw doesn't make any changes to your device, but you will now be able to apply your backup.
Really really really appreciate,I've finally get access to the recovery mode