Essen Electronics

Manufacturer Type Models Boot Menu Boot Once BIOS/UEFI Key Change Priority Acer     Esc, F12, F9   Del, F2   Acer netbook Aspire One zg5, zg8 F12   F2   Acer netbook Aspire Timeline F12   F2   Acer netbook Aspire v3, v5, v7 F12 The "F12 Boot Menu" must be enabled in BIOS. It is disabled by default. F2   Manufacturer Type Models Boot Menu Boot Once BIOS/UEFI Key Change Priority Apple   After 2006 Option       Manufacturer Type Models Boot Menu Boot Once BIOS/UEFI Key Change Priority Asus desktop   F8   F9   Asus laptop VivoBook f200ca, f202e, q200e, s200e, s400ca, s500ca, u38n, v500ca, v550ca, v551, x200ca, x202e, x550ca, z202e Esc   Delete   Asus laptop N550JV, N750JV, N550LF, Rog g750jh, Rog g750jw, Rog g750jx Esc Disable "Fast Boot" and "Secure Boot Control" in order to boot from MBR formatted media. F2 ...

DELL SYSTEM FACTORY RESTORE   ACER SYSTEM RESTORE

    Beep sounds can be used as diagnostic indicator.The computer might emit a series of beeps during start-up if there are errors or problems. This series of beeps identifies a problem and is called a beep code. Refer to this table below which illustrates the beep codes and the possible problem:   AMI BIOS beep codes Below are the AMI BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary. Beep Code Descriptions 1 short DRAM refresh failure 2 short Parity circuit failure 3 short Base 64K RAM failure 4 short System timer failure 5 short Process failure 6 short Keyboard controller Gate A20 error 7 short Virtual mode ...

  You can run Check Disk from the command line or within other utilities. At a command prompt, you can test the integrity of the C drive by typing the following command:     chkdsk C: To find and repair errors that are found in the E drive, use the following command:  chkdsk /f C:    Note that Check Disk can’t repair volumes that are in use. If the volume is in use, Check Disk displays a prompt that asks if you want to schedule the volume to be checked the next time you restart the system. Click Yes to schedule this.   The complete syntax for Check Disk is as follows: CHKDSK [volume[[path]filename]] [/F] [/V] [/R] [/X] [/I] [/C] [/L[:size]] The options and switches for Check Disk are used as follows: volume Sets the volume to work with path/filename Specifies files to check for fragmentation (FAT16 and FAT32 only) /F Fixes errors on the disk /V Displays the full path and name of every file on the disk (FAT16 and FAT32); displ...

Hiren boot cd is Bootable live cd with all tools enough to repair most computer problems.It is an essential tool for every computer technition. You can download latest iso image from here and creat a bootable cd from that                                                   or Create a Hiren boot USB by following procedure 1) download Universal USB Installer here (wait 5 Seconds and click in the yellow button) if the link isn’t available search it in google. 2) create a folder called Hirens Boot 3)Extract or unzip the hiren boot cd .zip to the above folder 4)Run Universal USB Installer 5) In the drop-down menu select the option Hiren’s Boot CD .  click  the button browse   ISO in the  Hirens Boot folder 6). se...

  1) for that you can use Hiren boot cd            or        get parted magic and use Unetbootin to make a bootable USB drive   2 ) The system should booted with parted magic   3) Determine which drive is the one you want to wipe. The tools on the desktop should show you pretty obviously what drive /dev/sdX, most likely it will be /dev/sda  4) open terminal type        hdparm -I / dev / sdX      This will show the information pertaining to this drive   5) If the drive shows that it is frozen (no “not” to frozen) you will need to unfreeze it. The most effective way to do this appears to be to put the computer to sleep. To do this:          a) type echo -n mem > /sys/power/state b) This will put the computer to sleep. Once it’s asleep, you should be able to wake the computer up (touch some keys, move the mouse…) 6) Run the...

TV Digit-Microscope is a very good tool for micro-view;  it can easily used in many fields.   1. Skin inspection 2. Hair inspection 3. Industrial inspection: PCB, Material 4. Print Industrial 5. Textile industrial 6. Biological inspection 7. Jewelry, Stamp & Collections inspection 8. Education Purpose Product Specification 1. Image Sensor: Color CMOS Sensor: PAL/NTSC 2. Resolution: Same to Monitor display Max Pixel: 2M (1600*1200) 3. Controller: High Speed DSP (Driver Free, SOC) 4. Focus Range: Manual Focus from 10 mm ~ Infinite 5. Video Capture Resolution: PAL / NTSC 6. Build-in light source: 4 LED 60000 m LUX 7. Frame Rate: Max 30 FPS (Frames per Second) - Under 600 LUX Brightness 8. Life View: 30 frame per second 9. Magnification Ratio: 25X ~ 400X (Manual) Based on 15" LCD Panel 11. Interface: Video Port   12. Dimension: 112 mm (L) X 33 mm (R)

  Code                        Description      *#*#0*#*#*     LCD display test     *#0001# :         Serial Number     *#0523# - *#8999*523#  : Display Contrast     *#06#  :             IMEI Number     *#0228# or *#8999*228#  : Battery Info     *#*#0283#*#*     Packet Loopback test     *#*#0588#*#*     Proximity sensor test     *#*#0673#*#* OR *#*#0289#*#*     Audio test     *#*#0842#*#*     Vibration and Backlight test    *#*#1111#*#*     FTA Software version    *#*#1234#*#*     PDA and Phone firmware info    *#*#1472365#*#*     For a qu...

those that have the below listed Atheros adapters, and recently upgraded their routers (usually from a Wireless G to a Wireless N router from 2009 or newer), only to find they cannot connect to the internet anymore. Atheros AR5006 802.11a/b/g WiFi Adapter Atheros AR5007 802.11b/g WiFi Adapter Atheros AR5009 802.11a/g/n WiFi Adapter When using their old equipment, there were no problems. Symptom:  When upgrading to a new router, normally connection is made to the local network, but one cannot access the internet. Symptom:  Wireless connects if using WEP security or no security, but will not connect when using WPA2-Personal security. For those who have the above Atheros wireless adapters, and are experiencing issues with connecting to the internet, there is a driver available that should remedy the situation. It is good for Windows operating systems -- Windows XP through Windows 7 -- 32 or 64 bit. It may work on Windows 8 too, but I haven't tested it on ...

            When you are looking for a device driver for a piece of hardware, it is useful to know the hardware id of the device.The hardware identifier is a combination of the bus type, the hardware manufacturer (or vendor) and the device identifier. In some cases additional sub-system identifiers and revision information is included to distinguish between variations of a device. To check the hardware id for a device, follow these steps:  Open the Device Manager by type “devmgmt.msc” at the Run option in the Start menu.  In the Device Manager, right-click the device, and select Properties in the popup menu.  select the Details tab.  select the Hardware Ids in the drop down list. As you can see in the screen shot, there can be multiple hardware ID's for a device. The top one is the most specific identifier, and going down, the identifiers are more generic. The reason this is done is to allow a d...

1. Accessibility Controls - access.cpl 2. Accessibility Wizard - accwiz 3. Add Hardware Wizard - hdwwiz.cpl 4. Add/Remove Programs - appwiz.cpl 5. Administrative Tools - control admintools 6. Automatic Updates - wuaucpl.cpl 7. Bluetooth Transfer Wizard - fsquirt 8. Calculator - calc 9. Certificate Manager - certmgr.msc 10. Character Map - charmap 11. Check Disk Utility - chkdsk 12. Clipboard Viewer - clipbrd 13. Command Prompt - cmd 14. Component Services - dcomcnfg 15. Computer Management - compmgmt.msc 16. Control Panel - control 17. Date and Time Properties - timedate.cpl 18. DDE Shares - ddeshare 19. Device Manager - devmgmt.msc 20. Direct X Troubleshooter - dxdiag 21. Disk Cleanup Utility - cleanmgr 22. Disk Defragment - dfrg.msc 23. Disk Management - diskmgmt.msc 24. Disk Partition Manager - diskpart 25. Display Properties - control desktop 26. Display Properties - desk.cpl 27. Dr. Watson System Troubleshooting Utility - drwtsn32 28. Driver Verifier Utility - verifier 29. Event V...