I need a user manual and hard disc for the yamaha 4416 workstation and want to know where i can sourse them

Question edited for clarity.

Try a Factory Reset. Try a power reset first. Disconnect from the mains plug for 15 minutes.

System Reset - Yamaha PSR-S750 Service Manual

ManualsLib https://www.manualslib.com > ... > Service manual
There are two reset methods in the SYSTEM RESET display: Factory Reset and Custom Reset. ... This function lets you restore the status of the instrument to the ...

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  Yamaha PSR-S750 Reference Manual - System Reset

  https://www.manualslib.com > ... > Reference manual
  This function lets you restore the status of the instrument to the original factory settings. ... buttons to enter or remove the checkmark. ... operation for all ...
  
  

I do not know what you mean by 'resetting'.
Here's the manual:
https://usa.yamaha.com/files/download/other_assets/9/335089/aw2400_en_om_b0.pdf

See Page 81 in the manual http://www2.yamaha.co.jp/manual/pdf/emi/english/port/psrs950_en_om_a0.pdf

The original factory settings of the AW4416 can be restored by recalling Scene Memory '00'.

1) Press the [SCENE] button in the 'AUTOMATION' section.

2) Press the [F1] button to display the 'Scene Mem' page.

3) Turn the (DATA/JOG) dial to select '00.Initial Data' on the screen.

4) Press the yellow [ENTER] button.


Reference: Operation Guide, p. 203

Here is an online manual for it. Can't find a download.
http://music.manualsonline.com/manuals/mfg/yamaha/aw2400.html?idRes=12818647

http://www2.yamaha.co.jp/manual/pdf/emi/english/port/tyros4_en_om_a0.pdf

The actual disc speed in the unit has nothing to do with the speed that a CD plays back.

Read page 68 of your user manual for variable speed and pitch setup and changing.

http://music.manualsonline.com/manuals/mfg/yamaha/psr620.html there you go please give me some thumbs up!

The "battery" MAY be a soldered in type.

Here is your service manual:

http://elektrotanya.com/yamaha_aw4416.pdf/download.html

Scroll down on the web page to "Get Manual" and download the manual.

The battery is on page 153 in the manual at grid N-10... you are NOT going to like this... it is in a Dallas Semiconductor real time clock chip... You have to replace the chip. It is IC709 which is a DS12887 chip.

The physical location can be found on page 58 about half way down the "A" sectioning line on the right side of the page. It is a 24 pin chip... It MAY be in a socket, or maybe not... PRAY !

Wow... $11.12 each from digikey.com

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DS12887A%2B-ND

This info took me about 1 hour to dig out...searching for a battery was futile until I found the battery was related to the real time clock. If this isi soldered in, you need to have proper tools as the board is likely multilayer and takes care in solder removal... especially the new ROHS hi temp solders. You should take this to a board repair house if it is not socketed.

Not sure about your particular keyboard, but on the Yamaha Tyros the style will NOT start rhythm until you select start AND hit a chord.

The style doesn't know what chord to start with until you trigger it.

SOMETIMES the style has to be moved to a user space...

One has to read and then DECYPHIER how to work these synths... Spend a little time with the user manual, as hard as it is to understand.