Bright then dims on bootup

Is it normal for the display to go bright momentarily then dim again to where I left it when booting it up (not waking from sleep)? I just noticed it and wanted to make sure.

tigger666,
try setting your brightness to max., and restart. Do you still see it?

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Officejet 8600 Pro+ Power-switch lamp cycling bright then dim

My Officejet 8600 Pro+ printer is brand new, and is connected via my wired network. It's working perfectly so far. Wi-Fi and fax are both (deliberately) turned off / disabled & not needed.
The Power-switch has a nice green light to indicate that the printer has "power" OK - and the lamp seems to have two "on" states, namely 'dim', and 'bright'.
The printer seems to go into "Sleep Mode" OK, and the control panel turns off as expected after my preset "Sleep" interval. (I'm not using the scheduling options.) It also wakes-up OK when I send it a print job. Again, everything is fine so far ...
While the printer is in this low-power 'ECO' state, the intensity of the green Power-switch lamp varies slowly between bright and dim, on a roughly 6-second cycle - 3 seconds at 'bright', then 3 seconds at 'dim', and it never stops cycling - bright then dim then bright etc..
BUT ... and here's my question ... should this lamp be staying 'dim' while the printer is asleep?
Or, does the fact that it is returning to 'bright' every few seconds imply that it is somehow failing to STAY fully 'asleep'?
I can't find any clues about this in the printer's manual.
Perhaps I should raise a query with the HP Support folks, but I thought I'd ask here first.
Thanks in anticipation. Edited to add:
I'd be glad to know whether any other Officejet 8600 owner (or the owner of any other Officejet model) sees this same bright/dim behaviour on their Power-switch lamp? Thanks.

Thanks pcwizard, I got the same reply yesterday from my HP Customer Care enquiry, and I'm satisfied now that my machine isn't cycling repeatedly into sleep mode and then 3 seconds later coming half "out" of sleep mode! I know the HP design folks may never look at these Forum entries, but I'd hint to them that perhaps this ambiguous "sleep" indication might be made an optional choice, so that I could choose a steady low-intensity light instead. It's not an enormous issue of course, but in my little "office" space, this Power button is right in my line-of-sight as I work, and - even though I now know that my printer is perfectly healthy - the slowly-pulsing light had become a recurring distraction until I covered it with a little 'disc' of semi-opaque sticky tape Thanks again.Colin

I tried to update my ipod 4th gen. but when I came to see how much charge the screen was red and it wasnt charged and i cant use my ipod. the screen turned blue also one time, and now the apple logo comes up and its bright then dim and it stays there help

I tried to update my iPod 4th generation while it was charging and when I came back to check on it the screen was red and it wouldnt go off, and my ipod wasnt charging like it was supposed to. I found out how to get the color of the screen off but my ipod always has the low battery thing and when I charge it sometimes the screen turns blue or the apple logo comes up bright and then it gets dim and stays there. My ipod wont turn on, and I really want it to work again. Help me please! Also, I noticed my ipod battery hasnt been lasting long as it should efore this happened.

Try:
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- If not successful and you can't fully turn the iPod fully off, let the battery fully drain. After charging for an least an hour try the above again.
- If still not successful that indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.

My iMac screen goes bright and dim randomly, any idea why?

my iMac screen goes bright and dim randomly, any idea why?

Sounds like a power issue.
Try Resetting the System Management Controller (SMC)

I spilled water onto my iPhone. It turns on..says searching..then dims and the screen has an endless circle..please help.

I spilled water onto my iPhone. It turns on..says searching..then dims and an endless circle appears. Any help me with this???

Turn it off. Though it's probably too late to prevent permanent damage.
Make an appointment at the genius bar of your local Apple store. Try to arrive with a positive attitude and your credit card. An out of warranty replacement is US$149.
Sometimes they can be salvaged by placing them in a bag of uncooked rice in a warm, dry place for several days to a week. The rice will absorb as much moisture as it can. If you've had it on though, and are experiencing the symptoms you describe, and/or have attempted to charge it, it is probably toast.

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IPhone 5 with iOS 8 - Auto Brightness too dim / dark

Hi all,
I just updated my iPhone 5 to iOS 8 and the auto brightness makes the screen too dark and hard to read. This was not an issue with iOS 7 on my phone. I've tried using some of the calibration tips online, but none seem to help.
When I am outside, it's fine, it will automatically adjust the brightness all the way up. The issue is inside, then the auto-brightness will make the screen too dim to be able read very well.
I know I could turn off the auto brightness feature and manually adjust the brightness, but I really liked the feature with iOS 6 and iOS 7.
Is anyone else having this issue? Any tricks I could do to fix this, or is this just an issue with iOS 8 on iPhone 5s? It would be nice if Apple gave us more control with auto brightness, like maybe letting us set the min and max brightness when it is on auto.
I did see this post from jedi31780 where his iOS 8 auto brightness isn't adjusting at all, but other than that, I haven't see any other posts online about this yet.
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Thanks

Thanks! I went into settings under brightness when I was in a room where I felt the iPhone was too dim and I moved the brightness up till I was happy with it. it now uses that as a baseline and adjusts from there instead of where it was before, so no longer too dim. I thought I already tried that before, but either I adjusted it again to thy the calibration steps, or maybe I adjusted it from the "control center" screen and maybe that one doesn't save.
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IPad will not charge after IOS 7 update unless the brightness is dimmed,..Why?

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I do not know if it's iOS7 related or not. My 2 is still working. However, my first 2 was returned to best buy after the charging port on it died. So that can happen. ANd it happens with little to no warning. CHarges monday, doesn't on tuesday.
As far as I know the issues with 'unsigned' lightning devices is just the cable, not the power brick, but there's no official word (nor do I expect one)
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IdeaPad U430 Screen brightness randomly dims

hello,
i just had my new lenovo U430 ultrabook
latley i notice that once in a while
without any action before
the screen brightness on my laptop dim's himself
and only after i push the F11 buttom
the one that supose to lower the brightness
the screen go's back to the max light...
i did change the setting on windows power options
and chage maunaly in all plans the Enable adaptive brightness
i change it bay turning the function off on battery and plugged in options...
this laptop is amazing' but this little bug driving me crazy..
i hope you guys can find me a way to fix it..

Dear Matangeta
Welcome in lenovo community
Please go to power option from the control panel and set the plan to be Do Nothing and then give your laptop a restart then change the power plan to your preferable setting and test if the issue still exist or not .
Let me know
Thanks
Alaa
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Screen suddenly black when brightness is dimmed

Hello everybody,
I encountered a very strage behaviour yesterday at my iMac (27" 2,8GHz, 8GB, mid 2010).
Since 10 month I had the brightness of the display to maximum and no problems. Yesterday I tried to dim it to 2/3 of maximum.
I heard a very silent tone with a high frequency (like your dimmer in the livingroom for your lights), but it was not disturbing so much.
After some minutes the display got black _while_ i was working and moving the mouse.
I could reactivate it by
- going to sleep mode and waking up again or
- moving the mouse to one of my active corners (which has the function to swich off the screen) and moving it again to the middle of the screen
It is not predictable, but the display goes off when it is dimmed to much.
Had somebody of you the same issue?
Kind regards
Reinhard

Something i should add:
After a call to Apple I tried PRAM and SMC reset already but this did not solve the issue.

Iphone 4s ios 8.1.2 auto brightness auto dim in bright place

Hi,
my iphone 4s with ios 8.1.2 got auto brightness problem.
when i turn on the auto brightness function, it will automatic go to minimum brightness. i try under sunlight also get same result. may i know how to solve? thank you

Hello there hebe2003,
It sounds like your Ambient Light Sensor keeps automatically dimming the screen when you have that function turned on, no matter the light conditions. I would recommend these troubleshooting steps from the following article, named:
Get help with the screen on your iPhone, iPad, or iPod touch
If you have a screen protector, try removing it. Try removing your case if it includes a screen protector.
If you see the issue in multiple apps, restart your device.
If restarting doesn’t fix the issue, restore your device.
If you still see the issue after you restore, contact Apple Support.
Thank you for using Apple Support Communities.
Take care,
Sterling

Screen Brightness Keeps Dimming

My new Sony SVS131290X laptop will not keep it's screen brightness lit. It keeps dimming by itself. I have tried setting the function + F6 key, going to power options and adjusting the brightness there, and also tried advanced power options. It dims after 30 seconds. Has anyone else had this problem?

Hi everyone, I just recently purchased a Sony Vaio Pro 11" and I have been struggling with this issue the past 2 days, and now I have a proposed solution! Prior to doing this I had tried two things (outlined below) and neither of them fixed the issue for me, so if you are in the same boat this might work for you too. WHAT WORKED for me was going to the graphics properties control panel:Right click on the Desktop home screen and select "Graphics Properties" > click the "Power" tab > click "On Battery" > and under "Display Power Saving Technology" click OFF That fixed all my auto-brightness adjusting woes. Hopefully this helps someone else The two steps I took that didn't quite work:1. Went to Vaio Control Center > Image Quality > turned OFF the auto brightness = still had the dimming issue2. Went to the Start screen, scrolled down to the apps section and in the search bar > typed services.msc > opened up Services > clicked "Sensor Monitoring Services" > went to the drop down menu and changed from "manual" to "disabled" and restarted my laptop = still had dimming issue

Screen brightness to dim and unable to adjust using slider and buttons

hey guys ive had my macbook air about a week now and one night the screen decided to turn really dim all of a sudden i assumed this was due to me shutting down however the next day wen i turned it on again the screen was just as dim and when i try to adjust the brightness setting via the slider in prefrences or the f1 and f2 buttons nothing is happening,
have any of you had the same problem if so how did you get it solved
cheers

you have to reopen the display adjustment in the System preferences, and Un-click the Automatically Adjusts Button. I kinda like this feature, but not all do, its an Apple thing, takes a bit of getting used to, saves the eye strain. I have noticed, as I am blind in my right eye, and tunnel vision in my left. that this is really good , and helps me a lot..
Play with the MBA , you'll figure it out..
Have fun
Neil

My MBP won't turn on. The charger light goes green but then dims out before it goes out again

My MBP suddenly stopped working when I came back to it. I tried charging it with a couple of different chargers and different sockets. The charger light turns green but then slowly dims down before it turns off.
I tried all key combinations for starting up - holding the power key for long, Cmd+Opt+P+R with power button, Cmd+R with power button, but none of them work. The laptop won't turn on.
What could be wrong?

If you are still under warranty call Apple Care. Make sure you get a case number as all repairs have an additional 90 days of warranty.

Bright then dims on bootup

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