Is it plugged into a power strip? If so try it directly to a plug. If that does not work, pull the brick out and let it sit for a few minutes, then firmly insert the brick back in. The power button like all the rest of the buttons are rubber caps over depression toggles. Check and see if there is anything around the power button. The silver cover plate comes off fairly easily. insert a fingernail or the like under its edge next to the red power button and slowly lift up. It should come off fairly easily. this should allow you more button surface to clean if that is the source of the problem.
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The input to your treadmill is about 120 volts Ac. The output from the board will be about 30 Ac. Almost nothing on there will be measured in DC. Your particular issue is your motor controller. It needs to be replaced.
The vx510 operates with a power adapter. The 115VAC is what the adapter plugs into, and the DC numbers are for the output to the actual machine. Basically you just plug the power adapter into the UPS and it's already plugged into the machine...just like a laptop, etc.
However...the figures your are quoting of 22-26VDC at 1.5 amps do not agree with Verifone's published specs for the vx510 of 9.4 VDC at 4.0 amps (link to product specs page). I'd be very careful.
Plug printer straight to power outlet in the wall. Bypass any surge devices or power strips as they can draw away power from the printer.
Properly secure the power cord.
Unplug the power adapter from the printer, replug after 30 seconds. The power adapter is the rectangular black box, behind the printer where the power cord is attached. Check if it's warm or cold. It can be a defective power adapter.
If you have access to a voltmeter, test power adapter(30V output).
If problem continues, contact Lexmark technical support.
It is depends on your scanner power adapter and where u purchase the scanner from. Here if your scanner is from US then the adapter power input should be 100-120V 60Hz AC, if your scanner is from Euro, UK or Australia, the it should be 200-240V 50Hz AC, while if your scanner is from others place that not listed above then it should be 100-240V 50-60Hz AC. But the best way is look at your adapter itself, u'll notice the power input and output from the adapter sticker.
If you lost your adapter then be sure to purchase 1 that can output a 12 VDC, 340mA, 4.22W adapter to the scanner.
Make sure the plug is all the way into the AC adapter. Then, you will need someone to verify the output of the AC adapter. You should have a 16VDC and a 32VDC output from the adapter. If that is good, you have an internal problem with the printer. If the output voltage(s) are missing you will need to replace the AC adapter.
Here are the specs:
Input voltage: AC 100 to 240 V ~ 1 A 50–60 Hz, grounded
Output voltage: DC 32 Vdc===940 mA, 16 V===625 mA
HP part# 0957-2146 Call 1-800-227-8164 for availability.
The device runs on 5 VDC. There was an optional adapter available that used the keyboard output, that simply tapped the GND & +5 VDC. On the jack, the interior is +5, the outer contact is GND. The easiest way to power the device is to tap into a free line from your computer power supply. Alternatively, a transformer with 5 VDC 100 mA output should do the trick.
It could be the AC adapter. That is easy enough to check with a DMM. Turn on the meter, set to volts dc, push red probe into the hole in the output power jack and touch the black probe to the outside of the same jack. Have someone plug the AC cord into a good outlet(one you know has power). If the adapter is working you should see 12 vdc displayed on the meter. There still could be a problem as I recently found an adapter which displayed the correct voltage with no load but little or no voltage with a load. Testing with a load is a problem if you are not familiar with the procedure. Odds are if you have 12 vdc the adapter is fine and you have a short somewhere in the monitor. If you are handy with tools and feel confident, remove the back of the unit and check the fuses in the power supply. If they check OK you probably can't do much more. Unless you are an electronic tech you will need to take the unit to a shop for repair by a qualified tech. Good luck.