Old ipad not turning on with user passcode. Need to reset its user passcode

meff6333 wrote:

Need to reset its user password from my iphone. Ideas?

Yes, I can solve this one for you. Setting an iPad passcode from an iPhone is not possible.

Depending on exactly what this means:

Old iPad is not turning on with its user passcode

Here is how to proceed:

If "user passcode" means some forgotten iPad passcode:

If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

If "user passcode" actually means some old Apple ID and password that you are being asked to supply:

Find My iPhone Activation Lock - Apple Support