How to reset Yamaha spx1ooo professional processor

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 ...
  
  

You have a fault no one else has reported. There appears to be no reset procedure. Take it to a Yamaha Service Centre.

https://www.google.com/search?q=Yamaha+Electone+MR+700T+factory+reset

https://www.google.com/search?q=Yamaha+Electone+MR+700T+lights+flash+but+unresponsive

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To reinitialize the IS-SPX-1000 unit to its factory default settings:
1.
Unplug the unit from the power.
2.
Push the reset button and keep it pressed.
3.
Power up the IS-SPX-1000 unit.
4.
Wait with the reset button pressed for at least 8 seconds.
5.
Release the reset button.
6.
The IS-SPX-1000 unit will now boot in the factory default mode.

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

It sounds like you are having an issue with the sustain pedal for your Yamaha YPT-300 keyboard not working properly. There are a few things you can try to troubleshoot the problem:

1. Check the connection between the pedal and the keyboard to make sure that it is securely plugged in and not loose.
2. Check the settings on the keyboard to make sure that the sustain pedal is properly configured and enabled.
3. Try using a different sustain pedal to see if the problem is with the pedal itself or the keyboard.
4. Check the manual of your keyboard, some models have a specific setting to turn on/off the sustain pedal and make sure it's not turned off.
5. If the above steps do not resolve the issue, it's possible that there is a problem with the keyboard's internal connections or a malfunctioning component. In this case, you may need to contact Yamaha's customer service for further assistance or consider getting it repaired by a professional technician.

It's important to note that troubleshooting and repairing electronic equipment can be dangerous, especially if you're not familiar with the device, so it's best to contact a professional technician if you're not comfortable working with it.

Best advice would come from Yamaha itself. Here's the link to Customer Service-
Contact Us Support Yamaha United States

One of the 'plate' type reverbs is usually best on vocals. Preset 16, 19 or 26 should be suitable.

It should work.

The computer processor in these is NOT subject to the viruses like PC's are.

Do a factory reset on the keyboard to restore factory settings.