Is it recommended to replace battery after so many years? I have had it for 5 yrs.

SOURCE: My kindle will not charge. I plug it in and there

If you've explored all options with software settings and If you're outof warranty, you can try to open the kindle and replace the battery.There is a Kindle Repair Guide that shows you how to take it apat. There are services that can do it for you. Kindle Repair.

SOURCE: The kindle screen is frozen on the sleep mode, the

Try a different charger. If that fails too, you have a logic board issue. Amazon should give you a replacement. If you're out warranty, you can get the part at Kindle Repair and there is a guide that shows you how to open a kindle and install parts at Kindle Repair Guide.

SOURCE: Kindle locked up and now can't get it to turn on.

I have the same problem. The screen saver is partially frozen on the screen on the upper right corner and then blank down the rest of the right side. The rest of the screen is readable and I'm able navigate (turn pages, select different books, etc).

Did you figure anything out? Help!

SOURCE: My kindle will not start up even though it has

Yes:

1. Get a watch with a hand for the seconds.
2. Slide and hold the power switch for 7 seconds. After about 5 seconds the power light flashes three times. After 7 seconds, the screen will go blank and the device is switched off now. Release the switch.
   
3. Slide and hold the power switch for 15 seconds (no more, no less). Do not hold the switch too long, the time window for the reset is not very big.
4. After releasing the switch just wait. The Kindle will reboot after a few seconds.
   

SOURCE: kindle fire has red battery showing. I have charged it but it wont work

It may be the power cord but it is possible that your Kindle Fire's battery has died. If you noticed the battery life diminishing before it started flashing a red battery symbol this may be the case. Here is a site that has replacement batteries for the Kindle Fire:
3555A2L Battery for Amazon Kindle Fire D01400