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iHP-115 or iHP-120, Anyway To Tell Apart By Mainboard?

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Repairfreak:
I recently bought a used unit, front cover says iHP115, back cover says H120 and the unit has a 20GB drive installed.

I think someone may have put this together from other player parts. The installed firmware found was ihp_120.hex to my surprise and

the drive name was H120. Is it possible for a iHP-115 to work with the OEM  ihp_120.hex firmware? It seemed to work ok. However

now thinking it is a H120,  I  then downloaded and patched the most recent iHP120hex file available and installed a current build of

Rockbox for a H120,  the firmware update function did not start when pressed.  I then uninstalled the iHP_120.hex and installed a

Rockbox patched H110(US)-v166 version iHP100.hex (for ihp110/115) with latest Rockbox build for a iHP110/115 model. I then renamed

the drive from H120 to H100. The firmware update function now worked and the unit rebooted into Rockbox as expected. Therefore I'm

thinking the unit has iHP115 mainboard with a H120 20GB upsized drive installed. The back cover must have came from another unit

because it reads H120.

Question: is there any definite way to  tell by the mainboard if it is actually a iHP-115 like I suspect it is?

AlexP:
As far as I'm aware the only difference between H110/5  and H12/40 is that the H120 and 140 have 32mb of RAM compared to 16mb in the H110 and 115.  Perhaps you could check the wiki for the number, type and location of RAM chips in the H120/140 and compare that to your motherboard?

linuxstb:
I think the fact that the original iriver firmware accepted a ihp100.hex file, but rejected a ihp120.hex file is proof enough that you have a h115 mainboard.

But yes, as BigBambi suggested, the RAM chip will also be a way to distinguish.

Repairfreak:
I can't seem to find any RAM specific information (chip part numbers on Wiki relating to iHP-115 vs. iHP-120)

I would like to know the chip number of the 16MB and 32MB.

Can anyone advise of a link to this info?

Thanks

AlexP:
http://www.rockbox.org/twiki/bin/view/Main/IriverInfo

You can see the Samsung RAM chip on the front of the mainboard.  I'd look up the code from yours then google it to see how big it is.  However, as Linuxstb points out I don't think you need to.

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