Compaq 6735b – Dead No Lights


I have to admit this was a ‘lucky’ repair. While diagnosing where was the DC power, I discovered that a power MOSFET was open, No Power anywhere, no lights, no charge and stone cold dead. On the bottom of the board it was a mosfet FDS6676 that was open. ¬†When I replaced it with a substitute I was able to follow the DC circuit, but it dropped off at the power button. So testing that area I noticed that when I put the meter positive on point on the board the light behind the pwr button would flash briefly. Recalling […]

7 Tips for how to Prevent PC Errors


7 Tips for how to Prevent PC Errors Tired of PC Errors? Follow the 7 important tips listed below to prevent several PC errors and speed up your P Run Regular Antivirus and Antispyware Scans Virus and spyware programs are major threats for all computer users. These malicious programs considerably slow down your PC, generate frequent system errors, cause data loss, steal your personal information, and may even render your system unbootable. To prevent and remove these files from your system, you must regularly scan your PC with reliable antivirus and antispyware tools to detect and remove all malicious content […]

How to use oscilloscope to repair laptop


laptop How with an oscilloscope to repair has a which test point waveform transition times that of the more detailed the better if there is answer a detailed and useful , then I in Canada 10:00 prestige In fact, oscilloscope in our repair process used in the is not too much, after all, in incomplete information the case of, most of the fault can be by conventional methods solved! This is not specific models to a simple explain I use the oscilloscope repair when common action: a : for the common signal measurement 1.ADS #: address state signal by the […]


IC 1

REBALLING AN IC IC reballing steps are as follows: First take the mother board of which we need to remove the IC. Inject the flux (liquid) from any one side and let it flow from the other side. Cover all the near by components with Aluminum foil to protect them from the damage by the infrared heat and place the mother board on the BGA machine. Switch Switch ON the BGA machine to start the process. Set the down temperature at 200 deg and let it heat up to 70 deg. When the down sensor detects the required temperature, start […]

Acer Aspire 5942 5942G Replacing the LCD Module

replacing the LCD 1

IMPORTANT: The LCD Module cannot be disassembled outside of factory conditions. If any part of the LCD Module is faulty, such as the camera, antenna or LCD panel, the whole module must be replaced. 1. Align the LCD hinges with the Lower Cover screw holes and replace the LCD Module. IMPORTANT: Ensure that the cables pass through the Hinge Wells as shown to avoid trapping when the Upper Cover is replaced. 3. Run the Conductive cable along the cable channel 4. Run the LVDS cable along the cable channel using using all the cable clips. all the cable clips. 1. […]

Functionality Of a hard disk

Functionality of a hard disk

Functionality of a Hard Disk What is a Hard Disk Drive? – Also Known As HDD (abbreviation), the hard disk is a spindle of magnetic disks, called platters, that record and store information. In every computer all the data is stored on hard disks. Because the data is stored magnetically, information recorded to the hard disk remains intact after you turn your computer off. The hard disk is housed inside the hard drive, which reads and writes data to the disk. The hard drive also transmits data back and forth between the CPU and the disk. When you save data […]

Removing Laptop wireless card

removing wireless card 1

STEP 1 Start laptop disassembly with removing the battery STEP 2 Remove four screws marked with red circles STEP 3 Insert your fingers between the keyboard base and laptop base. Carefully lift up the keyboard bezel. STEP 4 Continue removing the bezel. STEP 5 Remove two screws securing the laptop keyboard STEP 6 Lift up the keyboard and put it on the top cover so you can access the connector. If you are replacing the keyboard you’ll have to unlock the connector before you pull the cable. STEP 7 Turn the keyboard over and place it on the palm rest. […]

Acer Aspire 4730Z 4730ZG Clearing Password Check and BIOS Recovery

Acer aspire clearing password 1

| Acer Aspire 4730Z 4730ZG This section provide you the standard operating procedures of clearing password and BIOS recovery for Aspire 4730Z/4730ZG/4330. Aspire 4730Z/4730ZG/4330 provide one Clearing Password Check and BIOS Recovery Acer Aspire 5735 5735Z 5335″ href=”/aspire-5735-5735z-5335/clearing-password-check-and-bios-recovery.html”>Hardware Open Gap on main board for clearing password check, and one Hotkey for enabling BIOS Recovery. Clearing Password Check Hardware Open Gap Description Item Description Location R347(RTC_RST) Clear CMOS Jumper Memory bay Steps for Clearing BIOS Password Check If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask the password during systems POST or when […]

Replacing the Bluetooth Module

Acer replacing bluetooth1

Replacing the Bluetooth Module Acer Aspire one AOD150 1. Connect the Bluetooth cable to the Bluetooth2. Place the Bluetooth Module in the Lower Cover as 2. shown. 1. Place the USB Board in the Lower Cover as shown. Ensure that the WLAN switch (red callout) is correctly placed in the spacer (green callout).   2. Replace the single securing screw. 3. Connect the USB cable to the USB Board. 4. Secure the cable in the connector with the adhesive 5. Connect the USB cable to the Mainboard. strip. Place the LCD Module on the Lower Cover and secure it in […]

Acer Aspire 4920 4920G Board Layout

Acer Aspire Board view 1

Board Layout Acer Aspire 4920 4920G Top View # Item # Item 1 LCD connector 7 Power board cable connector 2 Internal microphone cable connector 8 USB board cable connector 3 Speaker cable connector 9 ExpressCard/54 slot 4 Keyboard cable connector 10 ICH8-M chipset (south bridge) 5 Touchpad cable connector 11 Launch board cable connector 6 Media board cable connector Bottom View Switch Setting Short R525 to clear password. Standard Operation Procedures of Password Bypassing and BIOS Recovery For RD and CSD to debug easily, the system provide one hardware DIP switch for Bypassing Password Check, and one Hotkey to […]