Motherboard Repairing

Motherboard

COMPONENTS OF Hard Disk

1. IC’S
2. Chips
3. MICRO-RESISTANCE
4. MICRO-CAPACITOR
5. Normal-CAPACITOR
6. PACKAGE
7. FUSE
8. MICRO-COIL
9. Normal –COIL
10. Transistor
11. Diode

Problems of Motherboard

1. Dead
2. Hanging Problem
3. Ram not Access
4. Floppy Port not Work
5. IDE Port not Work
6. Parallel Port not Work
7. Mouse Port not Work
8. Keyboard Port not Work
9. CMOS work  

1. Dead

1. Physically check the motherboard
2. Clean the entire SMD chip & service your main board. Checking burning, blasting or SMD (main IC’s)
3. Clean the ram bank
4. Check all the chip resistance around the SMD chip
5. Check the jumper setting
6. Clear the CMOS
7. Check the CPU temperature
8. Replace the BIOS IC
9. Reinstall the all data cable & power cable
10. Reassemble the CPU

2. Hanging Problem

1. Check the software virus
2. Check the bad sector on hard disk
3. Check the internal & external cache memory from BIOS
4. Check the entire interface card one by one
5. Check the CPU (Processor) jumper setting
6. Check the memory jumper setting
7. Clean the ram & ram bank
8. Clean the entire SMD chip
9. Clean the system board with IP
10. Rewrite the same make & model 

3. Ram not Access

1. Replace the ram
2. Clean the ram & ram bank
3. Clean the area around the ram bank
4. Check the single, packages resistance of ram bank (Value 100 & 220 Ohm’s Resistance)
5. Resold the fuse, single & packages resistance around the ram bank. (Value 100 & 220 Ohm’s Resistance)
6. Resold the ram bank

4. Floppy Port not Work

1. Check the floppy drive is it properly work
2. Check the FDC function Enabled & Disabled from BIOS
3. Check the shortage legs of SMD chip of FDC
4. Resold the FDC port
5. Resold the FDC controller chip
6. Rewrite the BIOS same make & model 

5. IDE Port not Work

1. Check the hard disk & CD Rom is it properly work
2. Check the IDE functions Enabled & Disabled from BIOS
3. Check the buses damage, shortage between IDE ports to SMD chip of IDE
4. Check the IDE controller chip
5. Check the all fuse, single, packages resistance & all components around the IDE ports (330 Ohm’s Resistance)
6. Resold the all fuse, single, packages resistance & all components around the IDE ports (330 Ohm’s Resistance)
7. Resold the IDE ports
8. Resold the IDE controller chip
9. Rewrite the BIOS same make & model

6. Parallel Port not Work

1. Check the LPT port function is Enabled & Disabled from BIOS
2. Check & confirm working function & mode LPT port from BIOS is it correctly set from BIOS
3. Check the three modes of LPT port are ECP, EPP & SSP. Normally select ECP + EPP from BIOS
4. Check & Confirm the select LPT port address 378, IRQ address IRQ7 & DMA address DMA3 is  it correctly set from BIOS
5. Resold the LPT port
6. Rewrite the BIOS same make & model

7. Mouse Port not Work

1. Check the COM port functions Enabled & Disabled from BIOS
2. Check & Confirm the COM I address 3F8H & IRQ address is it  correctly set from BIOS
3. Check the buses damage, shortage between COM port to SMD IC of mouse port
4. Clean the COM ports & SMD IC of Mouse
5. Resold the COM ports
6. Resold the COM ports controller SMD IC
7. Rewrite the BIOS same make & model

8. Keyboard Port not Work

1. Check the jumper
2. Check the keyboard interface controller (loosing & Dry sold)
3. Check the all chip, fuse & coils around the keyboard connector

9. CMOS Error

1. Check the jumper
2. Check the CMOS voltage
3. Check the all chip, fuse & coils around the CMOS connector