Re: completely dark photo, only showing top 1/4 of pic,...
there is no problem with your cam for sure.
you must have changed the setting of the cam
adjust the shutterspeed and the aparture. and your problem will be solved... or
dont keep the cam on manual mode.. keep it on automatic settings and it should work.
also check out this link to learn more about how to use aparture and shutterspeed..... http://www.learnslr.com/slr-beginner-guide/digital-slr-learning-guide/av-mode-aperture-priority
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Remove the lens and fire a shot...look at the mirror....does it return? If not, the viewfinder will remain dark. If it's stuck in the up position, you'll need to find the cause but be careful...do not touch the surface of the mirror.
l For manual copy density adjustment, press the AUTO/ MANUAL/PHOTO ( / / ) key to select MANUAL ( ) and adjust with the LIGHT ( ) and DARK ( ) keys as desired. l For photographs, select PHOTO ( ) and then adjust with the LIGHT ( ) and DARK ( ) keys as desired. l There are 9 exposure steps indicated by 5 indicator lights. (The indicators light up one or two at a time.) Successive pushes of the LIGHT ( ) key will change the indicator lights in the order (3) / (3•2) /(2) / (2•1) / (1). Successive pushes of the DARK ( ) key will change the indicator lights in the order (3) / (3•4) / (4) / (4•5)/ (5) The automatic exposure level can be adjusted to suit your copying needs. 1 Press the AUTO/MANUAL/PHOTO ( / / ) key to select the PHOTO ( ) mode. 2 Press and hold the AUTO/MANUAL/PHOTO ( / / ) key for approximately 5 seconds. l The PHOTO ( ) indicator will go out and the AUTO indicator will begin to blink. l One or two exposure indicators corresponding to the automatic exposure level which has been selected will light up. The factory default setting is level “3”. 3 Press the LIGHT ( ) or DARK ( ) key to lighten or darken the automatic exposure level as desired. 4 Press the AUTO/MANUAL/PHOTO ( / / ) key. l The AUTO indicator will stop blinking and will light up steadily. l This automatic exposure level will remain in effect until you change it again by this procedure. Automatic exposure adjustment AUTO
I have worked on hplj4100's for years and have ran in to this plenty of times.You will have to have the laser motor mirrors cleaned.That means removing the top cover and cleaning the toner and paper dust build up that has accumulated on the laser motor mirrors that is preventing the laser light from a 100% unobstructive scan to the photo-conductive drum inside the toner cartridge. I hope that this helps
Your copiear has 6 mirrors that need to be clean up. 5 of them are kinda easy access. the other needs to be clean thru something thiner than your fingers. (you can see the mirror but no way you can reach it).
Now dont worry (not yet) about that 6th mirror since THEORICALLY it doesnt get dirty.
So try first to clean up the other mirrors. and see what happens.
They are located below the platen glass (remove it) and be careful with the lenses (do not touch them). clean everything that seems to reflect light Or images.
If nothing changes you may want to try out with a new cartdrige. Your drum may be done.
The blacked out part is the bottom of the photo therefore the obstruction is at the top of the frame on the camera.
Try the camera on the BULB setting without a lens on & look into the throat of the camera. You should see what is not clearing the CCD completely.
It could be the sub-mirror which is a little mirror behind the main one for the AF function or a shutter blade not clearing enough.
I would go for the first one.
It could be because.....
1. the sub-mirror spring coming off or broken
2. the sub-mirror is glided by a post on the side of the mirrorbox & this could of come adrift.
Most repairers can deal with this fault. If the spring has come adrift you should be able to pop it back in place.
All this may not solve your problem but it will at least give you better idea of what you are dealing with.
It sounds like you have something blocking your camera lense. Try taking the lense off and clean/brush it lightly. Do the same for the internal of the camera. You want to be especially carefull in this area. Now if it did this as soon as you first used the camera and it is completely clean, the digital film might be damaged. If that was the case, you need to get a refund or exchange for a new one. Let me know what happens!