How to replace the internal battery in the sony HDR-FX 1000 camera

I think it is a rechargeable CR2032 that is wired to the board and re charges when the camera is in use.
Some early models had the CR2032 under a clip panel where the main battery is fitted.

For the Error: 91:01 in Sony hdr-pj50e, I will suggest to follow the below steps:

·It may be due to flash or battery problem.
·Turn off the camera and then remove the battery.
·Don't put the camera again for about 1 minute.
·Turn the camera on again.

Please try your lucck with this software and see if it helps:
check this link;
http://recoverymechanic.com/

Hi, I'm sorry you are having problems with your sony HDR fx-1, first thing your firewire or i-link pens is bad, it may be bent or broken this is why you can't connect to a pc , and the reboot issues may be battery problems not charging or bad cells in the battery try replacing the battery,I hope this info will help.

HDR-CX150 lcd screen is showing upside down is there a way to fix this ?

Yes I think this is the camera that records on the mini tapes yes? I have heard of this problem, and it is mostly dust, fluff round the capstan drives, if you clean the camera heads with a tape cleaner cass it should be okay.
David

-it's look like thats is the dc/dc converter
...hope that give you an idea

There are internal fuses yes, but they are surface mounted ones and not a DIY repair. There are protection diodes internally as well. If the adapter was not the correct one, it is possible that it popped the diodes and fuse.

You can buy the service manual from Sony directly for a cost.

Hope this helps,
Dan

this is some problem with the internal software or hardware. nohting to do with externals. check it out by doing a hard reset.

Did you find a fix for your FX-1? I think mine got wet as well.