What does it mean if the red and green light flash together???

INITIAL BATTERY INSTALLATION
1. Remove the key plate cover, insert the key into the keypad and open the door.
2. Remove the battery cover plate located on the inside of the door.
3. Install 4 AA batteries provided and replace the battery cover.
NOTE
: If both the red and green lights are on while the safe is open, this indicates that the batteries are low and need
to be changed.

TO SET UP OR CHANGE A USER CODE
1. With the door open, locate the red button on the back of the door near the hinge.
2. Press the red button and listen for the beep.
3. Immediately enter your new passcode (3-6 digits long)
4. Immediately after entering your new passcode, press the "A" or "B" button on the keypad. Your new user passcode is now stored.
NOTE:
This safe stores up to 2 passcodes (a user code and a manager code). Entering a third code will erase the
first passcode entered.

SETTING UP OR CHANGING A MANAGER PASSCODE
1. Open your safe with the passcode you wish to change and leave the door ajar.
2. Press the "0" button on the keypad twice. Press the red button, listen for a beep and then enter your new user passcode.
New user passcodes may be 3-6 digits long.
3. Immediately after entering your new code, press the "A" or "B" button on the keypad. Your user code is now changed.
OPENING THE SAFE
1. Input your code and then press the "B" button, the green light will turn on.
2. Turn the knob clockwise within 5 seconds to open the door.
3. Each key pressed will be accompanied by a buzzer and a yellow flashing light. If the entered code is invalid the yellow light will
flash and the buzzer will quickly sound, this indicates the code needs to be re-entered.

CAUTION
: Entering the incorrect passcode 3 times will lock the system for 20 seconds.


More information can be found in the attached document web page.

http://www.paragonlockandsafe.com/manuals/mastermanual.pdf

When you change batteries the combination that you programmed into the the Sentry Safe will delete and you will get the red light error signal. At A1 Locksmith Service we recommend that you use the original master code that came with the Sentry Safe. If you can not find your owners manual with the master combination. Addtional help can be provided at A1 Quality Safe. (650) 240-5505

Batteries are getting low..change the batteries.

Tries tv unplug replug the tv back about an hour later,might resetting the tv back factory setting and should work again.Still have the problems,the main board it is shorted and dead require changing.The main board that board were the incoming broadcasting signal wire plug into it.U have some basic machanic skills like take things a parts and putting it back together again.Should have no problems change this board at all..Tried websites like Shopjimmy.com,eBay.com to buy a refurbish main board for the replacement.

Once you get the error light that means you are entering a user code that was deleted when the batteries went dead . Simply use the master code in your owners manual to open the safe. Reprogram new user code instructions bottom of this page.

I had this exact same problem. Then I realized the red reset button was actually INSIDE the safe itself. So you need to enter the factory default code "159" to open the safe, then on the inside of the safe next to where the batteries are is a red button. If you press that, the yellow light will flash and you'll get two beeps. That means you can now enter your own combination. I hope this helps.
-Mike

There are actually some certain meaning on the red light and green light showing different information to user. The summaries are:
1) Green On, Red Off = Printer Ready.
2) Green Fast-Flashing, Red Fast-Flashing = Printer warm up.
3) Green Fast-Flashing, Red Off = Printer off-line.
4) Green Slow-Flashing, Red Off = Processing Data.
5) Green Off, Red On = Cover Opened, Toner Empty or Developer Unit / Drum unit missing.
6) Green Off, Red Fast-Flashing = Paper Jam or waiting for jam reset.
7) Green Off, Red Slow-Flashing = Paper Empty or Paper tray is not inserted.
8) Green Off, Red Off = Printer power is off.
9) Green Very-Slow-Flashing, Red Off = Printer in sleep mode.
10) Green (any condition above), Red Slow-Flashing = Toner low or paper empty.

So what is your printer condition? Better know what is going on your printer so can solve the problem.

I need an instruction Manual for a Nutool sf20 safe

If a paper jam occurs while printing, the printer notifies it by the following combination of the four indicators. Remove the
jammed paper . After removal, open and close the top cover once to initialize the jam sensing