Why won't solid blue light cone on when i press button

Check OPC drum and charging roller.
Go to service mode and set develop
asterisk * button then press at a time 2 and 8 again press asterisk * button
select copier>adjust>develop
touch on develop increase the develop value 10, 20 as your satisfaction..

please read and execute the commentaries. God bless you
Charging Conventions

• 
  The majority of laptops will display a solid green, blue or purple battery light to indicate that the battery is fully charged. Most manufacturers indicate that a laptop is in the process of charging by displaying a solid or blinking green, orange, blue or purple light. If your battery indicator light is green, blue or purple, the battery is probably functional, regardless of whether the light is blinking. If the light is solid orange, the laptop is probably in the process of charging.
  
  

Battery Error Coneventions

• 
  Many battery manufacturers use rapidly blinking lights to indicate that a battery's charge level is low. In general, a laptop will rapidly blink orange or red when its charge drops below a certain level until the computer is plugged into a power outlet and charged. If your laptop's battery indicator continues to blink rapidly in orange or red or if it remains red even when it is plugged into the charger, it indicates a problem with your battery or the charger.
  
  

this sounds totally silly but is the power button on the vacuum actually off? Had the same problem, where the battery was completely empty i didn't know my son had switched the vacuum on put it on charge and the light was flashing. I took it off the charging stand pressed the power button then put it back....now charging perfectly. Anyone who doesnt have this appliance will think you sound stupid but its just a clicky button so visually the button looks the same on or off.

Indicator Lights:
1.Headset Status Headset Indicator Light
2.Powering on Steady blue, then intermittent flashes
(changes to standby mode)
3.Powering off Red appears and goes off
4.Standby Blue intermittent flashes
5.Charging battery Red solid light. Light indicator turns off when
battery is fully charged and headset is off.
6.Low battery Triple red flashes
7.Pairing mode Blue/red alternating flashes
8.Missed call Purple flashes. Press the call control button
to cancel flashing light.
9.Incoming call Triple blue flashes when ringing.
Power on and off:
1.Turn on the headset Press and hold the call control button until the
indicator glows blue. You will hear ascending
tones.
2.Turn off the headset Press and hold the call control button until the
indicator glows red. You will hear descending
tones. When power is off, indicator stays off.
If none of this is helpful then it may be that your battery is dead, if that is the case then you will need to replace the whole headset. The battery's are not replaceable.

Good luck from Headsets Direct!

use this site and put 220 in the search box - your explorer 220 is found and you can download the user guide http://www.plantronics.com/north_america/en_US/support/manuals.jsp;jsessionid=83D442E12D37E83038D66C83670075A9.delta#results
see page 14 for details of the lights

• Powering on Blue flashes
• Powering off Red appears and goes off.
• Charging battery Red solid light.
• Low battery Red flashes.
• Pairing mode Blue/red flashes.
• Missed call Purple flashes. Single press the call control button to cancel.
• Ringing Purple flashes. Briefly press call control button to answer the call.
• Press call control button for 2 seconds to reject the call.

Plantronics Explorer 320
Indicator lights: Blue Light Flashing.

TheBlue light flashing indicates that your headset is working normally. There is no way to turn it off without turning off your headset.

Headset Status Headset Indicator Light

Powering on: Blue light flashes.

Powering off: Red appears and goes off.

Charging battery: Red solid light.

Low battery Red flashes.

Pairing mode: Blue/red flashes for 120 seconds.

Missed call: Purple flashes. Double press the call control button to cancel.

Ringing: Purple flashes. Briefly press call control button to answer the call. Press call control button for 2 seconds to reject the call.

Here's the link to your user guide:
http://www.retrevo.com/d/df/explorer300series_en.pdf?doc=178a4266e3e80dd257e740b75b59b3ad&ts=1265516774335

If you found this information helpful, please give me a big thumbs up when you rate my answer. Thanks!

First make sure your bluetooth and your phone are fully charged. Next press the on - off button in the middle of your bluetooth until it is a solid blue color. If it is flashing it is not in the pair mode. Just hold it down until it is a solid blue light.
Then set your phone to the pairing mode following your phones set up bluetooth instructions. Select the discover, search, or add function on your phone. Your phone should find the bluetooth device and ask "do you want to pair with it?" Accept by pressing yes or ok on the phone and entering the passkey or pin # of 0000 or 4 zeros.
Your phone should confirm when pairing is complete.

I discovered that I was not holding the on-off button down long enough for my bluetooth to reach the pairing mode and give me a solid blue light.

I hope this helps as I know how frustrating this can be.

Charge your Supertooth one via the car charger or by attaching a usb/mini usb cable to your computer usb port. Need to charge for 4-10 hrs. Indicator light glows red (needs charging), orange (charging) or green (charged)
Power on: Press green button for 1 second. Indicator light blinks blue. A beep will be heard
Power off: Press green button for 1 second. Indicator light turns red. A beep will be heard

To pair with your mobile phone:
1. Press green button on Supertooth for 5 secs until indicator light blinks red/blue 2. Access bluetooth menu on your phone. Turn bluetooth on. Execute a bluetooth search. 3. Select ST ONE from list 4. When phone requests password enter 0000 and press OK 5. The handsfree kit is now ready for use 6. Clip Supertooth on sun visor of your car so that the microphone and control buttons are directed towards you. 
To make a call: Dial number on phone. Supertooth will automatically connect. Indicator light is steady blue during call
To end a call: Press red button for 1 second
To answer a call: Press green button for 1 second. The bluetooth indicator will turn a steady blue.
To increase/decrease volume. Press volume buttons repeatedly up or down. They are situated between red and green buttons.
Hope this helps.

Does the light blink blue other wise and show red when charging ?
Make sure ear set is fully charged overnite?

Turn off and turn on.
Only then when turning on, DONT REMOVE YOUR FINGERS AND KEEP PRESSED for about 10-30 Seconds,, Watch for SOLID BLUE... Remove and proceed to pair..
If it still does not work, I would suggest that you keep trying .. Since I assume that the phone is charging well and then discharging over a time..

after it holds a steady charge, try holding the power button for a few seconds. if you get a blue light (blinking or solid) then its on, obviously. holding most power buttons on bluetooth devices will put them into pairing mode, as soon as you get a solid light, you can connect it to your phone...and if you just bought the headset, you should have an instruction manual. it will tell you in there how to make it work