1.Boot test: Press and hold FUNCTION and RESET. then turn power on.
Release the buttons when you see "TEST MODE". (y/n)

2. Prom test: Press Yes. Mx8 says Rom version 1.xx (c) 19YY DMC Good.

3.Display Test: Press Function. MX8 Scrolls through all letters.

4.Button Test: Press each button once when the promt appears. (Cursor
No, Yes, Function, Reset.)

5. Memory Test : Press Function and see " destructive test" Are you sure ?
Press yes MX8 says Ram test/ Ram good.

6. Initialize memory : Press Function.. MX8 says initialize RAM,Mx8 shows Elapsed Timer 00hr 00min 00sec. As soon as you see Timer, procedure is complete. Turn off the MX8 , wait a few seconds, and when turned on again it will be reinitialized!

Elapsed Timer 00hr 00min 00sec. As soon as you see Timer The
is complete. Turn off the MX8 , wait a few seconds, and when turned on again
it will be reinitialized!