Cash drawer on royal 425cx cash register won't open automatically what can I do to fix the problem?

SOURCE: royal 325cx cash register

http://www.howtomendit.com/questions.php?id=121&page=3

SOURCE: I need to change the tax amount on my cash register royal 425cx

I found the user manual online and followed the instructions.
thanks.

SOURCE: Royal Cash Register 130 cx Does Not Print Correctly

Cleaning and alignment is needed to solve these problems. As you can notice, the printer has various gears and small parts on it. Although the alignment for this kind of printer model is too complicated that only an authorized technician is capable of doing it. If you can look for an authorized service center for your cash register on your area then try to contact them. They either render home service or you will have to bring your unit to them.

SOURCE: I need free manual for Royal ER 145. Recently

Here Goes Program 2 position - enter 102420 att/total key - program 1 position enter o in the departments as non tas enter yy mm dd (09 04 23) hit charge key
enter time hhmm (1500) military time hit xtime depress amout tend key turn off and on and maybe will work for your child...Good luck......have fun

SOURCE: ROYAL ALPHA 587 CASH REGISTER

set to program... press the number 1 then press tax one enter in 4 digit tax then press amount total tend