20 Most Recent InFocus ScreenPlay 4805 Multimedia Projector Questions & Answers


This problem is almost never the actual fan itself failing..
The intermittent whine you hear is the result of the Mos-Fet fan driver chip which is the speed control current amplifier.
It's an 8 pin surface mount chip on the bottom of the main (lower) circuit board. This is a common failure with these projectors.
The chip is inexpensive and needs to be replaced by someone who is skilled in surface mount component technology. You can replace the fan but you will still have the same problem. Hint, the bad chip is not the one closest to the large fan connector... It's the one closest to the small fan connector and it will measure 45-60 ohm's between pins 7 and 8. the part (rns70d) is discontinued however there is a replacement that can be purchased at...

InFocus... | Answered on Mar 03, 2020


From the infocus_lp650 manual
Table 2:
Red LED Behavior Explanation
One (1) blink The lamp won't strike after five (5)
attempts. Check the lamp and lamp door
installations for loose connections.
Two (2) blinks The lamp counter hours have exceeded
lamp life hours. Replace the lamp and
reset the lamp hours counter.
Optional Accessories Part Number
Three (3) blinks The projector has shut down the lamp.
Replace the lamp. Contact Technical Support
for repair if replacing the lamp does
not solve the problem..
Four (4) blinks The fan has failed. Replace the lamp (the
lamp module contains a fan). Contact
Technical Support for repair if replacing
the fan does not solve the problem.
Five (5) blinks The projector is overheating. Check for a
blocked air vent. Contact Technical Support
for repair if clearing the air vents
does not solve the problem.

InFocus... | Answered on May 05, 2019


Again, this sounds like a light tunnel failure. See my other post about this.
I replaced my light tunnel with square brass tubing I picked up at the hobby shop.

InFocus... | Answered on Apr 06, 2018


You shold buy 520-0143-00 ECA, POWER SUPPLY, X2 Use if S/N contains an A in the fifth from the right digit "AMMxxxxA0000" 520-0126-00 ECA, POWER SUPPLY, X2 Use if S/N contains a zero in the fifth from the right digit "AMMxxxx00000"

cost about $90

InFocus... | Answered on Feb 10, 2018


the fans in these models do not have a speed sensor wire to let the main board know to turn off the lamp to not risk overheating. so if the fan goes, the lamp remains on. however, if the lamp exploded, check the vents for dust. there is a temp sensor that will shut down the projector if it gets too hot. if the vents are clogged, blow the dust out of the projector with canned air. the dust keeps in the heat that the projector is trying to expell. easiest way to repair the fan w/o buying a part: splice the fan wires together. they can share voltage. if the 80mm fan does not work at all after that, replace the fan (pn: 526-0192-xx).

InFocus... | Answered on Jun 22, 2017


Flip your screen upside down too

InFocus... | Answered on Oct 31, 2014


it may be due to over heat of any part due to partial short. first put a fan in front of it and proceed .if the time of working increase we can make it sure .i f continiously works fix a fan permanantly otherwise find the faulty component by multymeter cold test

InFocus... | Answered on Jul 05, 2014


find the closest infocus authorized service center to you from their website. ask for part number 525-0146-00

InFocus... | Answered on Jun 21, 2014


the new fan that you installed is a good one,but it wont turn on, because there is no electric current into the fan
something is wrong with the motherboard, the motherboard control the electric current (to the fan)
the motherboard is needed to be checked and repaired

We supply original projector lamp,bulb,parts,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
any questions, feel free to contact me
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InFocus... | Answered on Mar 17, 2014

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