Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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One sensor is missing lens and does not light up at all tried to align but wondering if bad sensor

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If it doesn't light up but the other one does and they are pointed at one another then it is bad.

Posted on Jul 09, 2010

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Posted on Jan 02, 2017

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DVD Blu-ray player BD-HP21U will not read my blu-ray DVDs even after downloading update on USB key and transfering it to the player! HELP PLEASE! Thank you


see this causes and fix i. God bless you
  1. Disc loaded upside-down.
  2. Transportation lock engaged.
  3. Dirty, scratched, or defective disc.
  4. Dirty or damaged objective lens.
  5. Loading (mechanical) not completed reliably.
  6. Damaged lens suspension or damaged lens cover preventing free movement.
  7. Dirt, gummed up lubrication, or damage in sled drive mechanism.
  8. Dirty/defective limit switch or sensor.
  9. Defective spindle motor.
  10. Spindle table height incorrectly set.
  11. Bad component in optical pickup.
  12. Cracks in ribbon cable to optical pickup.
  13. Need to adjust servo (or less likely, optical) alignment.
  14. Faulty power supply, electronics, or control logic.
  15. Bad connections including missing/erratic optical deck shield.
  16. External interference.

10_16_2012_1_38_02_pm.jpg

Oct 15, 2012 | Televison & Video

1 Answer

Recording error E454039000


please see your instru. manual and go to the section troubleshooting.
and fix it. God bless you
see this possibles causes.
  1. Disc loaded upside-down.
  2. Transportation lock engaged.
  3. Dirty, scratched, or defective disc.
  4. Dirty or damaged objective lens.
  5. Loading (mechanical) not completed reliably.
  6. Damaged lens suspension or damaged lens cover preventing free movement.
  7. Dirt, gummed up lubrication, or damage in sled drive mechanism.
  8. Dirty/defective limit switch or sensor.
  9. Defective spindle motor.
  10. Spindle table height incorrectly set.
  11. Bad component in optical pickup.
  12. Cracks in ribbon cable to optical pickup.
  13. Need to adjust servo (or less likely, optical) alignment.
  14. Faulty power supply, electronics, or control logic.
  15. Bad connections including missing/erratic optical deck shield.
  16. External interference.

Sep 23, 2012 | Philips Magnavox MWR20V6 DVD Recorder/VCR

1 Answer

My memorex dvd/cd player only plays black and white dvds


see this causes: and fix it . God bless you
  1. Disc loaded upside-down.
  2. Transportation lock engaged.
  3. Dirty, scratched, or defective disc.
  4. Dirty or damaged objective lens.
  5. Loading (mechanical) not completed reliably.
  6. Damaged lens suspension or damaged lens cover preventing free movement.
  7. Dirt, gummed up lubrication, or damage in sled drive mechanism.
  8. Dirty/defective limit switch or sensor.
  9. Defective spindle motor.
  10. Spindle table height incorrectly set.
  11. Bad component in optical pickup.
  12. Cracks in ribbon cable to optical pickup.
  13. Need to adjust servo (or less likely, optical) alignment.
  14. Faulty power supply, electronics, or control logic.
  15. Bad connections including missing/erratic optical deck shield.
  16. External interference.

Sep 23, 2012 | Memorex MVD2050-BLK DVD Player

1 Answer

Hi my dvd player reads wots on my usb stick but will not play?


see this causes and fix it. God bless you
  1. Disc loaded upside-down.
  2. Transportation lock engaged.
  3. Dirty, scratched, or defective disc.
  4. Dirty or damaged objective lens.
  5. Loading (mechanical) not completed reliably.
  6. Damaged lens suspension or damaged lens cover preventing free movement.
  7. Dirt, gummed up lubrication, or damage in sled drive mechanism.
  8. Dirty/defective limit switch or sensor.
  9. Defective spindle motor.
  10. Spindle table height incorrectly set.
  11. Bad component in optical pickup.
  12. Cracks in ribbon cable to optical pickup.
  13. Need to adjust servo (or less likely, optical) alignment.
  14. Faulty power supply, electronics, or control logic.
  15. Bad connections including missing/erratic optical deck shield.
  16. External interference.

Sep 23, 2012 | Televison & Video

1 Answer

How do I realign the sensors?


Both sensors will have their green led lights lit (on) when aligned. When not aligned only one sensor will be lit.

Make sure both sensors' lens are clean.

If still not aligned loosen the lit sensor from its mounting bracket using the proper tool, but most LiftMasters have a wing nut mounting for the sensors.

Aim the free sensor in the direction of the unlit one and look for its led to light. If necessary, using a screw driver remove the staples securing the sensor wiring enough to physically place the sensors eye ball to eye ball looking for the unlit sensor to light. If the unlit sensor still won't light then there is a broken or pinched wires some where between the unlit sensor and the garage door opener.

Jul 22, 2011 | liftmaster Garage Door 1/2 Hp

1 Answer

Hi, just wondering if I should try an dismantle my 85mm 1.8 Nikon lens as the focus ring has slowly but surely stiffened up to the point it will no longer rotate- AT ALL! No budging. My brother tried to...


If you have a lens collimator and other equipment required to ensure the proper alignment of the lens elements when you reassemble the lens, then go for it. If you don't have the gear needed to reassemble the lens properly, then I strongly suggest taking the lens to a good camera shop and have a trained professional do a clean-lube-adjust. It won't do you much good to have a focusing ring that turns if the lens elements are out of alignment so it doesn't focus properly.

Jan 03, 2011 | Nikon 85mm F1.8 D-AF Lens

2 Answers

Hi, we have had a 2001 gs 300 for 3 years. we


See if the plugs are oily first of all and check back with us

Jan 22, 2010 | 2001 Lexus Gs 300

1 Answer

Won't align because it says that the "paper is too narrow".


On the right side of the carriage at the bottom is where the media sensor is. If you dampen a q-tip with water and wipe the underside of that sensor you will see ink come off onto the q-tip. That sensor is on the right side of the ink carrier and the light shines down onto the paper. The lens gets covered with ink and needs cleaning...

Jun 25, 2009 | HP OfficeJet 6110 All-In-One InkJet...

2 Answers

Black screen


The issue is likely a bad lens assembly. Consumers wishing to repair this can check ebay for a replacement lens assembly, motor and sensor are usually included.

This happened to my Samsung s700 while I was mucking with it recently. It can happen when the lens meets severe resistance while trying to open, thus damaging the lens. The camera turns on and cannot tell precisely where the lens is, and subsequently the camera leaves the CCD imaging sensor turned off.

Replacement is easier than repair as lots of intricate parts are involved. However, the centermost ring will pop off with a little force, revealing four screws. The screws on the back side of the lens assembly are pretty obvious. Best of luck to anyone trying to fix this rather than replace it...

Apr 04, 2009 | Samsung Digimax S500 Digital Camera

2 Answers

Craftsman Garage Opener /


door will not go down unless you hold down the inside botton.

Sep 14, 2008 | Sears Craftsman LiftMaster Chamberlain...

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