BIOS Pins Descriptions Below is the description for BIOS pins: Symbol Description CS# Chip select. SI/SIO0 Serial Data Input (for 1 * I/)) / Serial Data Input and Output (for Dual Output mode). S0/SIO1 Serial Data Output (for 1 * I/O)/ Serial Data Output (for Dual output Mode). SCLK Clock Input. WP# Write protection. HOLD# … Read more
Firstly, before going to see SIO pins and their functions we will know what exactly is SIO. We will see it in this laptop motherboard repair guide. SIO stands for Super Input Output Controller. SIO is sometimes called KBC or EC also. The Super I/O chip is managed in the motherboard it controls. also, … Read more
There are various types of DDR RAM available. The main difference is power and the second is speed. Each DDR RAM requires three levels of voltage VDD for RAM chips, VTT called reference voltage is always half to VDD voltage and last SPD voltage. There is one small chip in very every RAM called SPD … Read more
When we connect the adapter to the laptop motherboard current flow via two MOSFET and current sensing resister from the battery charging section and is then given to a different buck converter. Sometimes any ceramic capacitor, MOSFET, or chip gets short to the group and adapter voltage gets loaded such a problem is called … Read more
In the below , we are going to see in detail 3v 5v ALW and LDO Section Typical 3v 5v Always Voltage Section This is the second section in the laptop motherboard called 3 volts and 5 volt section. This section receives adapter voltage and generates 3 volt to get power to SIO. This section … Read more
For doing repair the laptop VRM section we firstly must know that the laptop CPU VRM section generates CPU core voltage to the CPU. When all rest of the other power is ok then only CPU CORE voltage is generated. VRM chip work on 5 Volt and it requires enable signal to work called VR … Read more
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