Laptop Repair Training Institute
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DIY Fix your computer or home network yourself Start a computer repair business Learn about computers & networks How to troubleshoot laptops Troubleshooting guide A guide to buying a laptop testing machine Malware and Viruses IT Fundamentals
Advanced Repairing Tools 1.BGA Machine 2.Advance BGA Reballing Machine 3.Oscilloscope (CRO) 4.Debug Card 5.CPU Tester 6.BIOS Programmer 7.Laptop Battery Tester 8.Live Training Laptop Circuit Diagram
FREE Downloads SuperantiSpyware MalwareBytes CCleaner Process Explorer Download Hirens Boot CD D7 by FoolishIT IrfanViewer Linus Live CD Windos Register Cleaner
Advanced Repair Training Clock IC : lcd back light control Ddr memory power supply Other Common chipset Mosfets Used Crystal (14.318 Clock ) Training using eeprom programmer Bios update using eeprom programmer Training using bga soldering station Removing bga chips and rebolling it using reball stencil Ics rebolling, bga ball arrangement, pratice
Practical Step By Step Tutorials Practical Step by step Training Computer Repair Tutorials Useful technical guides exercises and reference material Designed to help you fix your own IBM American Trained Expert 20+ Years Experince in Laptop Repairs
How to Fix Your Motherboard for $15 When a Motherboard Fails Capacitors ‘” Mysterious Creatures When Capacitors Spring Leaks How To Recognize Flawed Capacitors How To Buy Substitute Low-ESR Capacitors Let’s Get Started! De-Soldering Capacitors No Pain, No Gain…? Equip Your Motherboard With New Capacitors
Read Our Tech Blog Now Component Level Motherboard Repair (Not replacement) How do you diagnose the exact component failure? LAPTOP MOTHERBOARD POWER ON DETAIL Troubleshooting Dead HP G6000 Motherboard What tools needed to diagnose motherboards Problems? How to replace the graphics card on a Dell 1420 Do you think if I heat up the VGA chip (or SB or NB) then the solder will melt and get fixed? HP DV4 laptop power switch problem
The Courses are easy to follow, high quality, and very professional. This is the best course I have ever seen! I would recommend this course to anyone who wants to learn how to repair computers.I have purchased other self-taught courses and the quality was nowhere near as good as Laptop Computer Repair course”.
A: I find it is very hard to explain this. actually, it is very simple and can be described in two words: current and singal. read the current change during booting tells you where the machine stopped. check the singals on the different part of motherboard tells what is wrong or what may missing.
Tools are: smd rework station, bga rework station, power supply has current meter. all the rest tools you can find in any radio tv repair shop.of course all the datasheets for the components, especially the schematic diagram, you will find it much difficult without it.
Q:What are common faults on mainboards? Do certain components fail? Is there a trend as to which parts fail quite often?
A: Different maker/model has different common fault. Toshiba S1 is vga chip, and can’t be repaired(well, almost can’t be repaired because the pcb quality is not very good so successful rate is very low). HP DV2000, 6000, 9000, compaq v3000, v6000, dell 1210, all those use nvidia chips have problem on vga chip or north bridge. easy to repair but have to make fan keep spinning after repaired, otherwise will break down in 1 or 2 week again.
hp nx5000, cpu pwm chip dry joint. acer 290, cpu pwm dry joint. hp dv1000, compaq m2000 protection circuit easy to blow up. ibm t40 vga dry joint problem. These are just few of them. every machine has its own common fault. but dry joint is the common problem for all machines. Motherboard repair is not as difficult as people thought, i think much easer than repair a tv.
Q:Dell 1525 Inspiron that says system does not recognize the installed battery this system will not charge the battery.
A:Charging battery in Dell laptop involves two major chips: EC(or someone call it super IO), PWM chip for battery charging. BIOS has no part of charging. Battery communicate with EC through SMB(system management bus??) and EC controls charging PWM. Fix charging problem is very hard in laptop repair, you must fully understand schematics, where all the signals come from and where to go. Today’s laptops are less and less with programmed EC, Dell 1525 has no programmed EC so it can be replaced with same model.
Doing routine check: 1. system power: 3V, 5V all presented ‘” ok 2. NBSWON signal: 3.3V presented ‘” ok 3. press power button, NBSWON pull down to 0V, ok 4. check DNBSWON while press power button, no response. ‘” problem. in here I made a mistake, I didn’t pay attention of the voltage of DNBSWON, this mistake waste me the next few days time. It should be 3.3V, but only about 1V.
Change EC as usual, because I thought the EC has problem. Then the big trouble comes ‘” it auto power up once I plug in the power but stop in 0.04A current. Check and find no S5_ON signal, which indicate south bridge has problem, so change south bridge. But still same problem and still no S5_ON. I find that the EC I change is kb3926A rather than kb3926C. In most case, this is no problem but in very rare occation… So I find a 3926C and put on. Now the motherboard is back to the same problem while I first start to check! So I change a wrong EC and this time I change a correct one, and also EC has no problem!
“It is an outstanding course; very insightful and easy to learn. I have used the things I have learned from this course on a customer’s computer. It’s a very nice and helpful course. Good to mention is your smartphone repair course which i also bought i love every bit of it and i cant stop reading… Read more…
