If I turn on the main power switch to my projector, the led's on the power switch and the 4 way (left, right, menu exit) switch come on, however, the power indicator does not nor does the lamp. I just replaced the lamp about 300 hours ago and physically checking it does not show any signs of being burned out. Does this indicate that the power supply on the unit has gone south?

1. Power Off: First, make sure the projector is powered off.
2. Control Panel: On the projector itself, locate the control panel with buttons. You should find buttons like "Menu," "Enter," "Up," "Down," "Left," and "Right."
3. Access Menu: Power on the projector and press the "Menu" button on the control panel. This should display the on-screen menu.
4. Navigate Menu: Use the arrow buttons (Up, Down, Left, Right) to navigate through the menu options until you find the "System" or "Settings" menu.
5. Unlock: Within the System or Settings menu, look for an option related to the system lock or security settings. Use the arrow buttons to select it.
6. Disable Lock: Once you've highlighted the lock option, press the "Enter" or "OK" button to access its settings. You may need to enter a password if it's set, so try default passwords like "0000" or "1234." If none work, you might need to contact Sharp support for a password reset procedure.
7. Unlock: After accessing the lock settings, disable or unlock the system lock.
8. Exit Menu: Exit the menu by pressing the "Menu" button again.
9. Test: Power off the projector and then power it back on to see if the system lock has been successfully removed.

Hello,

"Reset the lamp counter
i. Press and hold Exit on the projector
for 3 seconds to display the total used
lamp time.
ii. Press Menu on the projector or on
the remote control to access the lamp
hour timer. An adjustment message
will appear.
iii. Press or to reset lamp hours
and press EXIT to leave."

Reset instructions according to this
https://factory-reset.com/wiki/Optoma_Service_Menu
Optoma Service Menu Instructions Most of our Optoma Service Menu methods require the use of an original remote, typically you can not do it with just the buttons on the front of the set. If you no longer have your remote or have damaged it, we recommend that you purchase a Optoma Remote before trying to enter the service menu.
Method 1

1. Press simultaneously {UP} & {ENTER} buttons twice.
2. Press simultaneously {LEFT} & {ENTER} buttons twice.
3. A Service Menu will be displayed
   1. Then to access the Full Service Menu: Press the {UP}, {LEFT} & {DOWN} buttons once.
4. To exit, turn the Projector Off.

Method 2

1. Press the {UP} {UP} {LEFT} {LEFT} buttons.

Method 3

1. Press the {POWER} {LEFT} {LEFT} {MENU} buttons.

Method 4

1. Press simultaneously the {RE-SYNC} {ENTER} {SOURCE} buttons on the Projector.

Method 5

1. Press the {POWER} button.
2. It will show: "Power Off" or "Picture Mute".
3. Then press the {LEFT} button 8 times slowly.

Method 6

1. Press {MENU} {6} {1} {9} {MENU} buttons.
2. To exit the Service Menu: Press {MENU} {6} {1} {9}

Sanyo TV Service Menu Method 1

1.Unplug the power cable.
2.Press and hold the {MUTE} button on the remote control while plugging the power cable back into the outlet.
3.Keep pressing the {MUTE} button until the TV powers on with the Service Menu displayed.
4.Use the {CH+} {CH-} buttons to select menus.
5.Use the {VOL+} {VOL -} buttons to change settings.
6.Some menus might have sub-addresses. Use the numeric buttons {0} to {7} to adjust sub-item data.
7.Press the {MENU} button or turn the TV off to exit.

Sanyo TV Service Menu Method 2

1.Unplug the power cable.
2.Press and hold the {VOL -} button on the TV while plugging the power cable back into the outlet.
3.Keep pressing the {VOL -} button until the TV powers on with the Service Menu displayed.
4.Use the {CH+} {CH-} buttons to select menus.
5.Use the {VOL+} {VOL -} buttons to change settings.
6.Some menus might have sub-addresses. Use the numeric buttons {0} to {7} to adjust sub-item data.
7.Press the {MENU} button or turn the TV off to exit.

Sanyo Projector Service Menu Method 1
Factory Menu Access

1.Press and hold the {SELECT} and {INPUT} buttons on the Projector at the same time for about 10 seconds.
2.The Factory Menu will be displayed.

Service Menu Access

1.Press and hold the {MENU} and {INPUT} buttons on the Projector at the same time for about 10 seconds.
2.The Service Menu will be displayed.
Use the {UP} {DOWN} {LEFT} {RIGHT} buttons to move through menus and change values.
To exit, turn the Projector Off.

Sanyo Projector Service Menu Method 2

1.Press & hold the {MENU} button on the Projector for about 10 seconds.
2.The Service Menu will be displayed.
3.Use the {UP} {DOWN} {LEFT} {RIGHT} buttons to move through menus and change values.
4.To exit, turn the Projector Off.

hi
you can reset the lamp hour by the following settings

1.Power on the projector

2.Press the EXIT button on the projector for 3 second to display the total used lamp time

3.Press the MENU button on the projector (adjustment message will appear

4.Press the LEFT ARROW or RIGHT ARROW button to to reset the lamp hour

5.Press the EXIT button

ok

before you can access the hidden menu for the emu you must have the latest firmware or update for your receiver if you do then scan after complete scan press menu then 1570 go down to emu turn on with left or right arrow key on remote then press exit exit back to main screen and all should be working

if the lamp comes on, hold the exit button down until the osd comes on. press enter, then the right or left arrow button to reset it, then the exit.

The 4805 does not have a power button it has a power switch next to the mains power connector but that switch has no lights near it.
If you meant the power light on the top of the projector right next to the menu button is yellow that is bad. it indicates that the main board is not working which would explain the projector always being on. also the led being orange means that both the green and red led's are on at the same time (this is BAD)
This is not a valid function for the led's. Another indicator that the main board is wacked. By the way if you received the projector less than 30 days ago you can file a claim with the eBay resolution center that the projector is not as advertised/Described in the listing. And you might be surprised when you get your money back! the "NO RETURNS"is null and void if there was any gross misrepresentation or deception in the listing!! i.e. Not as described...

I have just reset my lamp! Disconnect all cables but the power, switch on it will search for a source, the lamp timer message will display press exit untill it will give you a message to press menu to reset the lamp timer, it will give you a option to press left or right to reset. I used the buttons on the projector not the remote.