WHERE IS THE LAMP DOOR FOR A MITSUBISHI - Mitsubishi WD-52531 Television

blinking yellow indicates no lamp or the lamp door is open. if you had the back off you may have gotten the door switch aligned improperly. the door switch is located just inside the lamp door.
the lamp may also be bad.

lamp part# 915B403001
see website:
http://www.shopjimmy.com/dlplamps?tv_brands_select=Mitsubishi&tv_models=Mitsubishi+WD-73837

The lamp cover is not installed properly or the lamp door switch isnt working thats what causes the 32 error.

Possible that the cooling fan is not operating , the filter is clogged or there is fault on the power section/motherboard and so it trips off.
Need to probe within to confirm if you can check on the filters, the lamp door switch and the lamp seating.

915P061010 part number for lamp, remove Philips head screw from lamp door in rear of set. YOU will find the lamp under door. Pull out, install new lamp, reinstall Phillips screw. Plug TV back in.
should do trick
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The lamp door or air vent doors are most likely not closed correctly as those doors will make the lights blink orange.

Make sure lamp door is properly on, there is a sensor on the door.

Be sure the lamp door is secure and the lamp is installed correctly. bad ballast or power supply.

You will be able to do it your self.. On the back of your tv there will be a door held in place by philips screws. Take the door off and then the lamp is secured by a few more coin screws( a nickle works). Remove them and remove your lamp.. Install your new lamp be very carefull not to touch your bulb. (it causes premature bulb failure..due to the oils on your skin) put all the screws and door back on (will not operate without the door) plug it in wait the 90 seconds for mitsubishi to reset then your done.. here is your lamp part number

915P049010

You can find the lamp acces door on the lower back left side. You will have two philips head screw to remove and you will see the lamp. Remove it and look at it. It will probably be shattered. There is also a filter right beside the access door. Be sure to clean that.
You owners manual can provide you with info to ordered a lamp and have it sent to your home

a 32 error code means the lamp door is open . Check the lamp door cover. If the door is closed and secure the safety switch is defective and will need replacement