Friday, 22 January 2016

How To Replace a Capacitor On a Computer Motherboard

Replacing a capacitor on a motherboard is a very detailed process and takes a steady hand to achieve. Each capacitor is attached to a motherboard very precisely, using solder. When you replace one, the same precision must be used or you risk permanent damage to your machine.

Locate the defective capacitor

Capacitors 
The first step in the repair process is to identify the capacitor that needs to be replaced. Typically, a bad capacitor has some manner of bulge on the top of it. Bulges are sometimes very subtle which makes them difficult to detect. Another sure sign that a capacitor is bad, is if it has leaked.

Remove the damaged capacitor

Solder pointsThe junction point for each capacitor is on the bottom of the motherboard, so you need to remove the motherboard to access the underside. Using your soldering iron, heat the existing solder at the junction point for each (usually two total) leg of the capacitor. Then, gently pull the capacitor away from that leg on the top side of the motherboard.
Tip: If you run into any issues melting the existing solder on the motherboard, try adding a little bit of new solder, then heating them together.

Replace the old capacitor

After removing the bad capacitor, you must clean the holes before you can put a new one in place. This is achieved by heating the leftover solder in the holes and using a "solder sucker" to remove any excess. When the holes are clean, you can proceed with installing a new capacitor. There is a positive and a negative leg on each capacitor, so you need to make sure you insert the legs through their corresponding holes in the motherboard. The motherboard should have markings to indicate which hole is positive and negative.
Tip: The positive leg, or terminal, is typically a little longer than the negative one.
Clip capacitor leg 
After you have inserted the capacitor legs into the correct holes, clip off the excess wiring from each leg. Clip them to the length of about two millimeters from the underside of the motherboard. Now you can apply fresh solder at each junction point. You should only need a drop of solder to secure the leg at each junction point. The bad capacitor is now replaced and you can test out the motherboard to see if it works properly again.
Caution: Make sure the new solder DOES NOT TOUCH any of the existing solder at another junction point as this could cause circuits to cross and short out the motherboard.

How to see hidden files in MS-DOS and the Command Prompt

While in the MS-DOS or the Windows command line, it may be necessary to view hidden files and directories. Navigate to the directory you want to view hidden files or directories and use either the attrib or below dir commands.

Viewing hidden files with dir command

dir /ah
The above command will list all hidden files and hidden directories in the current directory.

dir /ah-d
Lists all hidden files in the current directory (the one that you are in), but not hidden subdirectories.

dir /a
Lists all files and directories including hidden files and hidden directories in the current directory.

Viewing hidden files with attrib command

attrib
Typing the attrib command alone displays all files in the current directory with their attributes to the left of the directory path and file name. Files that have an "H" to the left are hidden files.
attrib | more
If there are too many files to list on one page adding "| more" to the end of the attrib command displays all files with attributes one page at a time.
attrib *.log
Finally, if you know the name of the file you're looking for or what it contains, adding it with or without wild characters displays all files with their attributes. For example, the above command would list any log file (including hidden files) with its attributes.

What Is Trojan Horse

A Trojan horse is a program that appears to be something safe, but in is performing tasks such as giving access to your computer or sending personal information to other computers. Trojan horses are one of the most common methods a criminal uses to infect your computer and collect personal information from your computer. Below are some basic examples of how your computer could become infected with a trojan horse.
Trojan horse
A site offers a free download to a program or game that normally costs money. Downloading the pirated version of a program or game allows you to illegally use or play, however, during the install it also installs a trojan horse onto the computer.
A popular screen saver website has become infected or uploaded infected screen savers. Downloading the screen saver to your computer also installs a trojan horse onto the computer.
You receive an e-mail that appears to be from a friend asking you to view this fantastic new program or look at a file. Opening the file infects your computer with a trojan horse.
A friends Facebook account is hacked and has sent out personalized messages telling all their friends to see this exciting new video. Opening the video requests a download that has a hidden trojan horse that infects your computer.

Saturday, 16 January 2016

Computer Hang Problem & Solution

Computer কেন এবং কিভাবে Hang হয়?
***********************************************************
→ কম্পিউটারের প্রসেসরের মান বা কাজের তুলনায় স্পীড কম হলে ।
→ কম্পিউটার র‌্যামের তুলনায় বেশী পরিমাণ কাজ করলে।আপনার কম্পিউটার র‌্যাম এর পরিমাণ কম কিন্তু আপনি অনেক বড় বড় কয়েকটি প্রোগ্রাম চালু করলেন। তাহলে তো হবেই।
→ কম্পিউটার হার্ডডিক্স এর কানেকশন এবং প্রসেসরের কানেকশন ঠিকমত না হলে, বার বার একই সমস্যা হতে পারে
→ যদি বার বার হ্যাং হয় তাহলে Cooling Fan টা check করেন এটা স্পীডে গুরছে কিনা।
→ hard diskএ Bad sector থাকলে বা অন্য কোন হার্ডওয়্যারে ত্রুটি থাকলে।
→ অপারেটং সিস্টেমে ত্রুটি থাকলে মানে…কোনো সিস্টেম ফাইল file delete হয়ে যাওয়াকে বুঝায়। যার কারণে কম্পিউটারে সমস্যা হতে পারে।
→ কম্পিউটার ভাইরাস দ্বারা আক্রান্ত হলে সাধারণত Hang হতে পারে।
এই কারণেই কম্পিউটারে বেশী Hangহয়। আর এই ভাইরাস অপারেটিং সিস্টেমের কিছু ফাইলের কার্যপদ্ধতিকে বন্ধ করে দেয় যার কারণে কম্পিউটার প্রয়ই হ্যাং হয়। কম্পিউটারে অতি উচ্চ মানের এন্টি ভাইরাস ব্যবহার করুন।
→ হাই গ্রাফিক্স সম্পন্ন গেইম চালালে তখন র‌্যাম সম্পূর্ণ লোড হয়ে যায় এবং hang হওয়ার সম্ভনা থকে।
→ কম্পিউটারের ফাইলগুলো এলোমেলোভাবে সাজানো থাকলে তার জন্য hang হওয়ার সম্ভনা থকে। refresh চাপেন এবং RUN এ গিয়ে tree চাপেন।

Wednesday, 13 January 2016

10 Android Tips And Tricks For A Better, Smarter Phone

#1 Make your phone quicker

With so many apps available, it’s easy to get carried away downloading a whole bunch of apps. We might use a handful of apps on a regular basis but the rest just sit on our phone most of the time. One of the easiest ways to make your phone quicker is by using Android’s Application Manager. While you might not want to delete or uninstall apps altogether, you do have the option of turning off apps to stop them from eating resources and potentially slowing down your phone. In settings, select Application Manager. All your apps should then pop up and it’s just a matter of going through each app and either selecting Uninstall or Turn Off. If you want to use the app again, you just simply go back into the application manager and select Turn On.

#2 Turn your phone into your personal assistant

Many people in Australia don’t know the potential of Google Now, the Android feature that becomes your digital personal assistant. It automatically organises the information you need into “cards” that pop up on your screen exactly when you need them. It works for hundred of different things, from weather updates, flight details, next appointments, events in the area, sports and even real estate. Google Now integrates all the different things you use your smartphone for to make your life easier. To use Google Now, download the app from the Play Store, customise the cards and notifications you want to see and let Now help you with your day.

#3 Let your voice do the work with voice commands on call

You can do almost everything on your phone with voice commands. It could be as simple as saying “OK Google” to turn on your flashlight, take a photo, or play your favorite song on spotify. To use voice commands, open the Google app, touch the menu icon and go into settings > Voice > OK Google Detection. From here, you can choose when you want your phone to listen to you. Then you’re ready for your voice to do all the work.

#4 Hide your selfies from others browsing your phone

 

 

Keep your embarrassing selfies safe from prying eyes with Guest Mode which locks away any important apps or features you like by creating a whole new profile in your phone. To activate Guest Mode, swipe down from the top of the quick settings panel, tap your avatar and choose Add guest. From here you can configure Guest mode to enable or disable particular apps and functionality by clicking on the cog icon next to Guest when on the User page found in settings. It’s also easy to create other user accounts, so if someone regularly uses your phone, you can create their own profile to keep your stuff separate.

#5 Expanding your phone’s storage capabilities

When deciding which phone to purchase, storage size is often a key consideration — use and cost wise. After all, you want to make sure it can handle all your important documents and apps. What most Android users forget is that they have access to unlimited storage space with Google Drive. Drive starts with 15 GB of free online storage which allows you to keep all your important photos, videos, music and documents in the cloud. Not only does it expand your storage space, but it also means you can take your stuff with you anywhere with files in Drive being accessible from any device. Google Photos also means you can save unlimited photos for free in the cloud.

#6 Extend your battery life

Today you can do almost everything with your smartphone but it also means our devices have turned into battery hungry machines. The days of charging your phone a few times a week is no longer possible. Fortunately for Android users, you can squeeze a few extra hours out of your device when you need it most. When running low, simply go into settings, click on Battery, tap the Menu button and select battery saver mode. It will limit non-essential features like location services and background data, so you can get an extra 90 minutes out of your battery when you need it most.

#7 Prioritise contacts and alerts to limit distractions

Whether you’re in a meeting or on holidays, sometimes you don’t want to be disturbed but still need to hear from important contacts or sources. This is where Android’s Priority Mode comes in. You can use it to customise notifications you want to receive and when. There is an option to set priority lists based on time and events scheduled in your diary as well. To set up Priority Mode, tap on the volume button and choose Priority from the pop-up dialog. Once activated, you can click on the cog icon and customise your preferences.

#8 Save and control your data usage

We’ve all be caught out exceeding our mobile data limits so any way to reduce unnecessary usage is warmly welcomed. Reducing background data is a simple way to help conserve data.
Most apps will auto-sync when an update is needed, regardless of whether you’re on a Wi-Fi connection or not, which can really take a toll on your data. However, on Android devices you have the option to turn-off auto-sync or to restrict background data altogether. Simply open the Settings menu and select Data usage under Wireless & Networks. Then click on the Restrict background data button.
You can also restrict data for certain apps by going into the individual app. Even better is the fact that you can set up reminders for when you are getting close to reaching your limit. Just go into the Data Usage menu again and set your mobile data limit. When you get close to your set limit, you will be notified and once your limit is reached, mobile data will automatically be turned off.

#9 Quick contact search

Avoid the hassle of searching through your contact list with this simple trick. Instead of scrolling through your contact list to find a number, simply start typing the person’s name into the numberpad and their number will pop right up.

#10 Unlock Android’s Easter Egg for a fun surprise

Google is known for creating hidden surprises in most of its offerings and for Android users each version of the platform has something special. In Lollipop 5.0, Google made a hidden Flappy Bird clone game, featuring the Android robot. To find it, go to Settings, About Phone and then tap the version number five times. When a lollipop appears, tap on it and the game will appear. It’s not strictly a tip – but it is a great little surprise that’s only available to Android users.

 

How to Know Who Has Read Your Whatsapp Group Message on Android

Last year, WhatsApp released a new double blue tick’ feature that allows users to know if their messages have been read or not. The blue tick appears as soon as your messages has been read by recipient. In a group chat, the check marks will turn blue when all participants in the group have read your message. While it is easy to know whether your message has been read in individual messaging, it is just a bit tricky to find out who has read it and who has skipped it in group messaging.
If you want to know whether a particular person has read the message or not in the group, here is how you can find it out.
  • Open WhatsApp
  • Tap on any group chat
  • Tap and hold on your sent message, a menu will popup at the top of the screen. Tap on ‘i’ (information) symbol.

whatsapp msg info sp1

 Now you can see a list of members who has read you message under ‘Read by’ section.

whatsapp msg info sp2

For those who haven’t read your message yet will be listed under ‘Delivered to’ section. That’s how to know who has read your WhatsApp Group Message on Android. If you found this tip useful, please do share it with your friends on your favorite social networks.


















How to Root Android without Computer (APK ROOT without PC)

Kingo Android Root has launched its APK Root for Android, which provides a universal one-click Android root solution for Android users. It is easy to use and saves the trouble to connect to PC via USB cable.
Before jumping into the rooting process, please make sure you get everything right beforehand.
  • Device powered on.
  • At least 50% battery level.
  • Internet connection necessary (Wi-Fi network suggested).
  • Allow installation of apps from unknown sources.

Root Android Without PC Step by Step


Step 1: Free download KingoRoot.apk.

You can directly download this apk file to your Android device by clicking the link above and then install it.
Kingo Root Apk Download Button
If Chrome has warned you about KingoRoot.apk, click "OK" to proceed.
Kingo Root Apk Download
If you are using PC to view this tutorial, you have three choices.
  • You can use the PC Version of Kingo Android Root , which has a higher success rate.
  • You can visit APK Root for Android on your mobile and download the file on your device.Kingo Root Apk Website
  • You can download KingoRoot.apk on your PC, transfer it to your Android device and then find the file via File Explorer and install it.

Step 2: Install KingoRoot.apk on your device.

If you didn't check "Unknown Sources" in Settings > Security, then during installation, you will get a prompt "Install blocked", stating that "For security, your phone is set to block installation of apps obtained from unknown sources". Just follow phone instructions and install Kingo Root on your device.

Step 3: Launch "Kingo ROOT" app and start rooting.

Kingo Root is very user-friendly and easy to use. Click "One Click Root" to start the rooting process.Kingo Root Apk Main Interface

Step 4: Waiting for a few seconds till the result screen appear.

Kingo Root Apk Rooting

Step 5: Succeeded or Failed.

Kingo Root Apk Root Succeed

NOTE If your device is not supported by Kingo or it fails to root, here are some tips for you.
  1. Go Troubleshoot sector.
  2. Save the log file. How to save log of Kingo Android Root?
  3. Email us to support@kingoapp.com with detailed information of your device such as device model, build number, kernel version and else. Attach the log file would be better.
  4. Follow us on Facebook (Kingoapp), reply to any post or send us a message.