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I've two questions:

If the right side door (slides over rails) is open, are both fans (paper output cooling fans) normally running or if door is open, the fans are normally disabled? So, never...

This morning I tried the following:

remove the HDD cooling fan, that one is running, I saw that.
remove one of the paper output cooling fan.
installed the original HDD cooling fan on the place...

I'm sorry that I didn't mentioned more clearly the brand/modelnumber SHARP MX3501N......but in post #1 is the name of the picture: touch-screen MX3501N.

This evening (if I have time and the...

now I'm confused.

see both pics, I assumed this is the correct part:
in the technical manual, section O, page O-1 and O-2 is told the removal of the paper output section.
I followed this...

Yes, I ran sim 6-2. You'll see 4 options.....3 of them are working (you hear starting somewere fans, but option 4 nothing. And the fans are never rotating,
The fans are now accessable, the right...

I found something on the WWW.

cancel error codes: run sim 14.
I tried that, and entered YES to remove all the error messages.
After rebooting, he came up with the same message: L4-31. No 24V...

Yes, I ran sim 6-2. Then you have the choise for 4 testruns different fans. Three tests you can hear running different fans......but enter POFM (the faulty fans, paper exit section) , nothing you...

well.....i cleaned the fans, a little oil on the bearings, and rotate a few times by hand, and cleaned everything around it......(a lot of dust)
by power on, i start the fans by hand to move, but...

I removed both fans, and looked around (type the partcode on top of the fan, 2408NL-05W-B56) and found some friendly prices: $ 32 each:
NMB-MAT 2408NL-05W-B56 Server - Square Fan 2408NL-05W-B56,...

part NFANP0082FCP1

Is this for real: ????? $ 112.00 each?

Sharp NFANP0082FCP1
NFANP0082FCP1 Archives - Printer Parts Store


I'll try first to fix it with the hints given here. :)

Thank you so much !!!
I found it.

And also both fans are not running. I opened the back cover, and checked the HDD fan, but that one is running well.

Strange, I expected one fan dead, but...

I've recieved by power on the error code: L4 - 31.
After reading......I understood one or two paper cooling fan, and located both fans (open right door, at the top)

Also: Run sim 6-2 to check if...