Our monitors are power by a 9 volt DC regulator running around 1.5 amps. Inside the monitors, utilizing a couple of 5 volt regulators, the 9 volts is converted to 5 volts which powers everything from the various sensors to the display.
Sometimes, a power supply can have issues where it just wont work to where it struggles to provide consistent 9 volts under “load.” You may have problems using the keypad or barcode scanner. Another thing is the display itself , instead of showing clear valid numbers on the led display, you may see flickering segments of the leds or all lines of the display may show “8888’s.”
If you suspect it may be the power supply and you have more than one monitor, you can “borrow” a power supply from another station and see if that resolves the issue. If it does, then we know it is the actual power supply. If there is still a problem, it is possible one of the two power regulators inside the monitor may need to be replaced. It is also possible where the outlet the power supplies are plugged into could be faulty. A maintenance check using a multi-meter can detect or eliminate this possibility. Voltage from the outlet should be around 120 volts. You can also use the multi-meter to check voltage from the power supply which should be around 9 volts.
If there is still an issue after trying the above, give us a call at 888-222-9828 and we will go from there.