LG MZ-42PZ44 42 green LED stays on

the orange light always turns on while the power key is pressed.... try changing the battery......

did you reset the lamp timer?

Hello there
Canon Pixma iP4200, Reset Procedure

1. Turn off the Printers.
2. Hold Resume button click POWER.
3. Hold button RESUME, release POWER
4. Then press the button again twice RESUME.
5. Release all the buttons.
6. Indicator led in green and stay green.
7. Click the button 4 times RESUME, if you want to make another transaction. :

Look at the table below:
· 1 led- Orange – Service test print 1 times – Orange – Service test print
· 2 led – Green – EEPROM information print 2 times – Green – EEPROM information print
· 3 led – Orange – EEPROM initialization 3 times – Orange – EEPROM initialization
· 4 led – Green – Waste ink counter setting 4 time – Green – Waste ink counter setting
· 5 led – Orange – Destination setting (Press Power > Press Resume 3x) 5 times – Orange – Destination setting (Press Power> Press Resume 3x)
· 6 led – Green – Print head deep cleaning 6 times – Green – Print head deep cleaning
· 11-13 led – Orange, Green, Orange – Return to menu selection
· 14 led – Green – Left margin correction 14 times – Green – Left margin correction

1. Turn off the printer POWER button.

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Here are some troubleshooting steps. From your description, my impression is a bad motherboard.
http://www.fixya.com/support/r3581893-how_to_troublehoot_a_portable_compouter_

Hi
This would be "Standby"
When you press standby, the display and audio turn off and a blank screen is displayed for 15 minutes.
You can change the amount of time the projector stays in standby mode; see “Standby Time” on page 27 for details.
The LED lights orange while the projector is in standby.
• If you press standby again within 15 minutes, the projector returns to normal operations immediately. The LED changes from orange to green.
• If you press standby again after 15 minutes, there is about a 60 second delay before the lamp turns back on. The LED flashes green while the lamp is re-lighting.
• If you don’t press standby again, the lamp turns off after 15 minutes. The LED lights orange while the projector is in standby.
The full manual can be found here:
Infocus customer support
Infocus LP350 Manual
I hope these help
Mike

restart than on

Have a look at my 'I broke the glass post'

I thing it is the problem of horizantal output transistor.that is placed on hitsink of eht big in size.Or check vga cable.
Hope this be of initial help/idea. Pls post back as requested, how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FIXYA.

Most of the time this is caused by a defective lamp. If the light blinks the number of blinks is a failure code.

you have fault oscillation! u have defective parts