Iriver h340 new hard drive will not boot up

Sounds like the battery is dead. Rechargeables only last so long. I'd copy all the content off it, before the battery dies totally, which could make it not work even connected to your computer. Looks like you can get a replacement battery: Iriver h340 Google Search
And here's a video on replacing the battery: How to Replace the iRiver H340 Battery

H340 should show as a removable disk drive. Ensure it is formatted as Fat32, run chkdsk, or scandisk. Does the H340 boot into play mode? you did not say. I replaced my battery with no problems... so if it boots Ok it is a non-related fault.

They may need to be on the other way.

The reset button will not delete any file or function, just press that.
When you connect your H340 to PC, you may right click the H340 drive icon, and select 'property' -> clean up drive

You cannot get replacement parts except from a cheap broken H340 on eBay - the motherboard may be damaged on the one you order. Not available form manufacturer. Most of the time, I would say that these are not economical to repair, but 40GB players are hard to find - call best Buy's Geek Squad and see if they will do it. Otherwise, you will have to go with a local Mp3 repair service (Philadelphia is one of the few cities that actually has one of these).

-Tha Mp3 Doctor

I am not an expert, but the same thing happened with me and that's because the bit connecting the motherboard to the hardrive has been damaged, so may be the same for you....

Have you tried a program such as drive rescue (I got a portable version (for PC)from portablefreeware.com)
Likewise roadkill's unstoppable copier(google it, sorry no link) I don't know of Mac equivalents.

From memory the hard drive is a 1.8" Toshiba drive. If this is the case, you can get a USB enclosure to plug it into. (I got one on eBay for a similar situation with a faulty X-drive) You will need to pull the h340 apart before you buy it because there are a couple of pin configurations for 1.8 in drives. If you have to resort to cracking it open there was a video on youtube (I think) showing you how.

MisticRiver For iriver Enthusiasts would have more detail, I am going from memory and has been a long time.

Backup the h340 to your pc, format the h340 hdd and reload it, refresh database.

suggestion only, open it up and check the hdd connection. failing that, your hard drive is probly naffed

It can be the charger that is actually causing your battery to not hold a charge. The closest thing to you would be www.iriverstore.com. connie