I recently purchased a used register, the LCD is illuminated when plugged in, but none of the buttons work or beep, and nothing is displayed on the LCD. On a previous register we had a similar issue which was solved by performing a master reset. I've found the manual which gives instructions to do so, but it says to turn the service key from the (SRV') position to the (SRV) position. I've tried turning the key to various positions, with no luck. Can anyone tell me which key position I am supposed to turn to (PGM1, PGM2, OPX/Z etc.)
SOURCE: I have sharp er-a420 it was in my garage for two
Most Sharp register, including the ER-A420, have a rechargeable battery mounted inside to hold all memory when the power goes out. It should last a few months, but two years is a bit much. This might get it going:
There is a strong chance this won't do the job, because the memory has been randomized by total loss of power when the battery died. Worse yet, the battery may be too far gone to ever take a solid charge again. If so, you probably need the help of a Sharp register dealer to replace the battery, totally clear all memory and reprogram it. It's probably worth the money; the -420 is an excellent little register.
SOURCE: my sharp cash register ER-A550S stop working
The letter H appears in the screen. The register will not respond. Any idea to what the Letter H means?
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