Lamp has stopped working.

Try a reset. Start by unplugging for 1 minute, then plug back in & if still won't restart try the following. If none of the following work, you will need a technician.

Initializing the TV in many cases can remedy a problem.
In the 2006 product line Initialization is now a user function.
Pressing the front panel "INPUT' and "FORMAT"
buttons at the same time activates Initialization. When
complete all user settings will have to be set again. The
table in Figure 4-3 list the User Initialization procedures.
Note: Pressing INPUT and FORMAT is the same as
the Initialization in the Option Menu (MENU-2-4-7-0)
Order Name Procedure Results Notes
1 System Reset Press <System Reset>
on Front Panel
Hardware & TV operating
software reset.
POWER/Timer LED flashes for 60
seconds. No customer settings
are changed.
2 User Initialization
Press <INPUT> &
<FORMAT> on Front
Panel at the same time.
All customer Audio &
Video settings are reset to
factory default.
All customer settings will need to
re-configured.
3 Reset System
Defaults
From the remote, press
<MENU> <1-2-3>
<ENTER>
All customer settings
except V-Chip are reset to
factory default.
Netcommand, Channel Memory,
etc., will need to be re-configured.
SERVICER
PROCEDURE 4 Initialization
From the remote, press
<MENU> <2-4-7-0>*
select "INITIAL" press
<ENTER>
All customer settings are
reset to factory default.
All customer settings will need to
re-configured.
MITSUBISHI RESET / INITIALIZATION CHART
CUSTOMER
PROCEDURES
Figure 4-3
Figure 4-4
LED Indications
The front panel LEDs, refer to Figure 4-4, also assist in
determining the cause of a symptom. Figure 4-5 illustrates
normal LED operation. Figure 4-6 shows the
LEDs response when a problem is detected and indicates
the possible cause.
Power/Timer
Indicator
Status
Indicator
Lamp
Indicator Condition
Off Off Off Off (standby)
Blinking green
fast Off Off Initialization (10 - 65 seconds)
Off Off Blinking
green fast Lamp runs for 1 min after PTV off
Green Off Off Power On
Blinking green Off Off Power On Timer is set
NORMAL LED INDICATIONS
Power LED Status LED Lamp LED Condition
High Temperature - check ventilation air flow.
(Temperature sensor is disconnected.)
Off Off Blinking yellow Lamp cover is open.
Lamp failure (Lamp fails to turn on)
Off Off Red (Lamp turns off after lighting)
Lamp is broken
Off Blinking Red Off Fan Stop
Off Red. Off Circuit failure. (Run Error Code Check)

When you say "lamp broke", do you mean the lamp actually physically broke? (as in 'exploded'?)

Was it a Factory replacement bulb, manufactured by Sony? (did it have the Sony logo on the box?) Many "3rd party" lamps are made from inferior materials, made in inferior conditions... and produce inferior results... including what you've mentioned. If this is the case, I suggest getting a replacement, or better a refund, then get a real Sony lamp... personal experience speaking here.

Normal failure mode of the ballast is that it will usually be totally dead, probably 85% of the time. Sometimes you will see one that's struggling to output enough power to maintain proper brightness.

What you describe would be a VERY rare failure, indeed. The ballast can not really burn out the lamp, by design. It's possible the ballast could have been weak, and just now failed... if the lamp still looks to be in good physical condition, this is a possibility, though remote.

BTW... 6 years is pretty good, but it's more about operational hours. I believe those low power lamps should last 5,000 to 8,000 hours, for an original Sony lamp.

Another thing to keep in mind is the lamp cooling. If the fan that cools the lamp has failed, and for some reason the detection circuitry is not realizing that... this could be a problem. These arc lamps operate at about 1200 degrees F (internally), and require a lot of cool air to keep them from literally melting, or exploding.

Possible:

Lamp about to fail (too dim and set will shut down).

Lamp Ballast failing (it drives the lamp)

Color wheel issue (usually there will be a high pitched or fan like sound heard but not always)---if wheel turns too slow set will detect that and turn lamp and set off.

Two things to look at---------the lamp to see if shattered inside AND with it removed look where it faces at the color wheel--see attached photo.

Look to see if any segments are broken, missing etc. Many of the wheels fail in this way and some will have a high pitched or even fan like sound before they fail.

Some when really bad will make a grinding noise also. The set monitors the speed of the wheel and if it slows or stops the set will almost instantly turn the lamp off(if possible watch from area where lamp is to see if at turn on to see if it for a moment lights or not.

One possibility is a failing capacitor in the power supply. "Difficult power on" is a common symptom in many electronic devices; even dishwashers with electronic controls, and is a precursor to complete failure. A visual inspection of the power supply unit may reveal one or more electrolytic capacitors with a domed top, and possibly leakage out of the top. (See the photo at the bottom for a comparison of bad electrolytic capacitors with good ones. The good capacitor on the right has a flat top.) Replacement capacitors for low voltage circuitry usually cost less than $1.50, but there will be some labor involved in getting the power supply out for repair. (I use Panasonic FR series capacitors for these replacements because they have a long life and greater ripple current rating than most original parts.)

Did you reset the lamp hour timer when you changed the lamp? If not, you may have run it up against the limit (it thinks you never changed the lamp) and it's locked out the projector as a safety measure because lamps beyond their rated life are prone to explode. Four attempts to light up the projector after the end-of-life limit on the lamp will lock it out.

There is a procedure on page 68 of the owner's manual for resetting the lamp hour timer. You will have to estimate the time already used on the new lamp, subtract that from the maximum time permitted, then keep track of the time so you don't risk a messy explosion (glass and mercury vapor clean-up).

For your convenience, I've included a link for the manual (Adobe Reader or other PDF viewer plug-in required).

http://www.sharp-world.com/products/data_projector/xgmb70x/pdf/mb70_e.pdf

Resetting the lamp time
After pressing the "?" key on the remote control in Stand-By mode, press the "9876"
and press the "OK" button.
And then three LED in the front is stop after flashing for a moment.* Lamp Life Time Confirmation
1. Method1 : Enter ADJ mode with using the remote control. You can be confirmed
because " Lamp Life Time XX hr" is appeared.
2. Method2 : With using the remote control offered to consumer if you press the
menu button continuously, OSD menus will disappear then press the "9876" and
press the "OK" button to enter ADJ mode you can see "Lamp Life Time XX hr"

hello, here is the instructions on how to reset the light

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL SOON message will come on. Change the engine oil as soon as possible within the next 600 miles (1000 km). It is possible that, if driving under the best conditions, the oil life may not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at least once a year and at this time the system must be reset.
If the system is ever reset accidentally, change the engine oil at 3000 miles (5000 km) since last oil change.
To reset the Engine Oil Life System, do the following:

1. Turn the ignition to ON, with the engine off.
2. Slowly fully press and release the accelerator pedal 3 times within 5 seconds.
The reset is complete when the chimes sound and the CHANGE OIL lamp goes out. If the lamp stays on and no chime is heard, repeat the reset procedure.

3. Turn the key to OFF.

If the CHANGE OIL lamp comes back on when the vehicle is started, the engine oil life system has not reset. Repeat the procedure.

90% of the time the lamp is bad when the lamp is bad a lot of the time you will here a buzz sound by the lamp its trying to trun on the lamp but cant. also look at the flashing lites on the front of the tv it should give you code

If I remember correctly, you hold down either the power or the menu button for 30 seconds... I believe it is the power button, and it will briefly display it on the screen, but this assumes it was reset at the time the lamp was installed. The counter counts up on this model, and the lamp replace light will come on at 3000 hours. I have 2 of these units, and I have gotten at least 5000 hours out of each lamp. Toward the end of the lamp life, it may start getting dim and/or have difficulty starting, but I probably wouldn't replace it until you either notice the dimming or the lamp fails, although I've heard some say they can damage the projector when they fail, I have not had any problems.

there isn't one. you need to see the menu. but what color is the led and is it blinking?
green- all is well
red blinking:
1 time- lamp not striking after 5x.
2 times- lamp has more than 3000 hrs. replace lamp.
3 times- lamp failure. replace lamp.
4 times- fan failure. shuts down.
5 times- undiagnosed error. possibly ballast or colorwheel.

if the colorwheel won't spin, the lamp won't light. when you turn on the projector, do you hear a high-pitched whir? if not, the colorwheel needs replacing.