Why is my scanner producing all black images? I have a HP PSC 1410 printer with a built-in scanner. I've been scanning documents and images with it for the last couple of years. Recently my scanner has stopped performing as expected and I can't scan or copy images\documents.  My problem is that every images\document I'm trying to scan - the result from the printer is a black page. I've been googling about this issue and couldn't find any helpful stuff beside replacing the whole printer - which is something i'm trying to avoid.  Any ideas ? I've read something about the shipping lock of the scanner but couldn't find any information about how to check it. Is this something that can be repaired, or do I need to get a new scanner?
HP PSC 1410 all scanner's images are black I have a HP PSC 1410 printer with scanner inside.  I've been scanning documents and images with it for the last couple of years.  Recently my scanner has stopped performing as excepted and i can't scan or copy images\documents.  My problem is that every images\document i'm trying to scan - the result from the printer is a black page.  I've been googling about this issue and couldn't find any helpful stuff beside replacing the whole printer - which is something i'm trying to avoid.  Any ideas ? I've read something about the shipping lock of the scanner but couldn't find any information about how to check it..
Statistical inference when the sample "is" the population Imagine you have to do reporting on the numbers of candidates who yearly take a given test. It seems rather difficult to infer the observed % of success, for instance, on a wider population due to the specifity of the target population. So you may consider that these data represent the whole population.   Are results of tests indicating that the proportions of males and females are different really correct? Does a test comparing observed and theoretical proportions appear to be a correct one, since you consider a whole population (and not a sample)? Remove HTML Tags from an NSString on the iPhone How to show wifi password? Free products of cyclic groups Given $G$, $H$, $G&#39;$, and $H&#39;$ are cyclic groups of orders $m$, $n$, $m&#39;$, and $n&#39;$ respectively.   If $G*H$ is isomorphic to $G&#39;* H&#39;$, I would like to show that either $m = m&#39;$ and $n = n&#39;$ or else $m = n&#39;$ and $n = m&#39;$ holds. Where * denotes the free product.  My approach:  $G*H$ has an element of order $n$, thus $G&#39; * H&#39;$ has one too.  But already the next step is not clear to me, should I show that there is an element of length $&gt; 1$ which has infinite order or what would be the right approach here?  Thank you. Find and replace text within a file using commands How can I find and replace specific words in a text file using command line? You can't see the question owner's special color When the owner of a question comments on their question or an answer to their question or self-answers their question, they get a special color for the box around their username.  The problem is, you can't see the box:        Can you please make this not white on white? How to attach my repo to heroku app Alternative IDE for VB6 and VBA Is there a word for somebody who cares for his/her child too much? I have just finished watching the 3rd season of .  I am wonder whether there is a word for somebody who cares for his/her son/daughter/child too much, like Dr. Cal Lightman? Show that $A_n$ is the kernel of a group homomorphism of $S_n \rightarrow \{−1,1\}$. How to install ubuntu on lenovo g580? I'd like to install Ubuntu 13.04 on Lenovo g580 and I have this issue. After a few seconds of booting liveUSB screens gets black and nothing happens. I've read somewhere about connecting second screen to solve similar issue. Of course this didn't solve it, but it provided something like terminal with     initramfs>   and few basic commands ..  Is it possible to install Ubuntu on Lenovo g580 hardware? I also checked  Ubuntu 12.04: failed  Mint 13: SUCCEED (x32 and x64)  Is it because of drivers? Of course I want Ubuntu instead of Mint. :) When should I use "didn't" instead of "haven't"? Is haven't supposed to mean something I may still do and didn't not?  Can I use didn't for something I might still do? Why $\sum_{k=0}^m x^k $ is equal to $\dfrac{x^{m+1}-1}{x-1} $? Who can help me proving this (but you can no longer use $\sum$ in the proof):  $$\sum_{k=0}^m x^k=\dfrac{x^{m+1}-1}{x-1}$$ I am trying to perform centrality analysis with sDNA with ArcGIS Pro (ver. 2.7.1). However, I have failed to run the Preparation &amp; Integral Analysis in sDNA with the same reason. What is the problem and What should I do? How do you use Excel server-side? A client wants to "Web-enable" a spreadsheet calculation -- the user to specify the values of certain cells, then show them the resulting values in other cells.  (They do NOT want to show the user a "spreadsheet-like" interface. This is not a UI question.)  They have a huge spreadsheet with lots of calculations over many, many sheets.  But, in the end, only two things matter -- (1) you put numbers in a couple cells on one sheet, and (2) you get corresponding numbers off a couple cells in another sheet.  The rest of it is a black box.  I want to present a UI to the user to enter the numbers they want, then I'd like to programatically open the Excel file, set the numbers, tell it to re-calc, and read the result out.  Is this possible/advisable?  Is there a commercial component that makes this easier?  Are their pitfalls I'm not considering?  (I know I can use Office Automation to do this, but I know it's not recommended to do that server-side, since it tries to run in the context of a user, etc.)  A lot of people are saying I need to recreate the formulas in code.  However, this would be staggeringly complex. After my , I've now got a new suggestion: down votes should not have any side effect in meta.  By side effects, I mean something like banning me from asking questions due to too many down votes, which I am experiencing right now:     states that I am permanently banned unless I improve my standing by posting some quality answers.  Seriously, I'm new to the site, and thus I'm not capable of posting quality answers on Meta.  So my only refuge was to create a new account. I think this check for previously downvoted posts should be disabled on Meta. Take an FF body and a crop body, with similar MP rating - and the FF body will give a sharper image of the same object. At least, that seems to be the case - as here:    I assume a low ISO was used in both images.  Why does the FF body, with the same lens and almost the same MP, give an image that is so much sharper?   My best guess is that the diffraction / airy still play a role, and the larger pixels reduce effective overlap - thus increasing contrast/sharpness by displaying less of the neighboring diffraction, as below? So I'm trying to power 2 of these  together in series. I know that I have to add the voltage of the two lights together and get a resistor that restricts the power to that level. I have a 9V battery and the lights are 3V each. I brand new to all of this, and understand almost nothing, so any help would be appreciated. Can someone help me choose the correct resistor (And how to identify that resistor with the color branding thing) so two of those lights listed above can be wired in series? Thanks! When you suggest an edit to a post and view the post while it's pending, . But as noted in the , this linking hasn't been implemented for tag wikis/excerpts yet, partly because there are potentially two links to include and the wording is not entirely obvious, and partly because they're orders of magnitude less common.  Here's my suggested wording for the three cases.   Tag wiki excerpt only     Thanks for your edit!   This edit will be visible only to you until it is .  Tag wiki only     Thanks for your edit!   This edit will be visible only to you until it is .  Both     Thanks for your edit!   These edits will be visible only to you until they are peer reviewed (, ).        I can't directly address the prioritization of tag wiki edits, but I'd appreciate the corresponding  or  mark, at least. Do greenhouse gasses make the world habitable? An ageing gent says he does not accept this statement:  It's a fact that greenhouse gases, predominantly water vapour, keep the Earth  from being hostile and cold; that CO2 albeit in trace quantities is also a  greenhouse gas and therefore helps keep the planet warm...   I know no more about why he rejects this statement - maybe it is that water vapour alone would do the job. The gent in question has a first class degree and a doctorate in physics.    Is there a debate within the physics community over this or am I misunderstanding?