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All Tutorial Repair Course Laptop Desktop Macbook Monitor and TV
14 Oct
0
Not Working RAM Slot-H81M-S2PT Motherboard

Not Working RAM Slot-H81M-S2PT Motherboard

There is a Gigabyte H81M-S2PT motherboard in this video that one of its RAM Slots doesn't work properly. This problem can originate from different blocks. In the below video you’ll see the process of troubleshooting and repairing this laptop...

11 Oct
0
Repairing Lenovo W540 that Turns ON with Battery Only

Repairing Lenovo W540 that Turns ON with Battery Only

Have you ever had a laptop which works with battery connected but it doesn’t with its adaptor? Well we have a Lenovo laptop on the video below which works perfectly with its battery but as soon as we plug in the adaptor (with no battery), it...

03 Oct
0
Laptop Speaker Diaphragm Repair

Laptop Speaker Diaphragm Repair

We have an Asus N552V laptop in this video. With a problematic speaker that produces weird noise. And as I couldn’t find the speaker on the market, therefore I decided to capture a video and show you how to disassemble this model of Asus laptop...

01 Oct
1
Asus K43SV Turns ON with NO Display

Asus K43SV Turns ON with NO Display

Today, we have an Asus K43SV laptop which turns ON but with no display. After disassembling the laptop and performing the initial tests, I came to realization that there is short circuit on motherboard which caused to burn different ICs on the...

22 Sep
2
How to Repair MacBook Part 3

How to Repair MacBook Part 3

This is the third part of MacBook repairing videos in which we’ll continue analyzing Apple laptop schematics. And on this video you’ll see how the very important voltage, PP3_V42_G3H and SMC_RESET_L signal are generated and we’ll analyze them as...

19 Sep
0
Repair Laptop LCD Backlight

Repair Laptop LCD Backlight

In this video, there is a Sony VPCF1 laptop with a problematic screen backlight which means there is image but the screen is dark. These kinds of problems can originate from “Inverter” or “High Voltage” or the screen backlight might have been...

06 Sep
1
What to Do When a Laptop turns ON with Not Display?

What to Do When a Laptop turns ON with Not Display?

Voltage Rail table is on page 2 or 3 of most schematics. This table is very valuable for laptop repairmen because it shows the presence of different voltages in order of priority on the motherboard and this table is so helpful in the process of...

27 Aug
0
Lenovo B590-Solve B+ short circuit

Lenovo B590-Solve B+ short circuit

In this video, laptop input has shorted circuit and by plugging in the adaptor, voltage gets disconnected. You’ll see how to troubleshoot the problem by the method of injecting voltage after checking power. Enjoy 🌸 💚

26 Aug
0
Capacitor Failure in Repairing Graphic Card

Capacitor Failure in Repairing Graphic Card

We have a Graphic card that its image gets pixelated. After performing initial tests, we realized that the capacitors have failed. In the video below, you will see important tips in changing capacitors and how to test them. You’ll also realize...

17 Aug
0
Repairing Water Spilled Asus Laptop-Random Turn ON

Repairing Water Spilled Asus Laptop-Random Turn ON

In this video we have an Asus X541U laptop which apparently turns ON randomly and when I checked the board, I found water spillage marks on it. And due to the fact that the oxidation of boards often occurs in voltage directions, we’ll need to...

16 Aug
0
How to Ohm Check Laptop Motherboards using Digital Multimeters

How to Ohm Check Laptop Motherboards using Digital Multimeters

When we are asked technical questions on the Technical Support section of the website, we realize many members have not performed the initial tests or have just become acquainted with the website. That's why in this tutorial video, I explained...

10 Aug
2
How to Repair laptop CPU Fan

How to Repair laptop CPU Fan

In this video, we have a Sony S series laptop that we did not find its fan on the market. In this short video, we will solve the problem so that if you didn’t find a device’s fan, you can fix the issue with this method or similar methods. Stay...

09 Aug
0
How to Solve Not Detecting VGA Port Problem in SAMSUNG Monitor

How to Solve Not Detecting VGA Port Problem in SAMSUNG Monitor

In this video, there is an SA300 Samsung monitor that has 2 DVI and VGA ports and by plugging in the VGA cable, it doesn’t have image (display). This problem is a very common one in Samsung monitors, so make sure to watch the video ;) Stay with...

08 Aug
0
basic electronics in laptop repairing

basic electronics in laptop repairing

It is a known fact that if someone wants to learn something -and anything- it would be best to learn it from the beginning and basics to intermediate and then at last to the advanced or professional levels. In this way he/ she would be a highly...

04 Aug
1
How to Test Dual MOSFETs

How to Test Dual MOSFETs

There are some MOSFETs on some boards, similar to the picture below, which are so similar to single MOSFETs. In fact they are single High and Low MOSFETs that come in one package. How can you distinguish a single MOSFET from a Dual MOSFET before...

03 Aug
4
Repairing Laptop LED Backlight | Backlight Failure

Repairing Laptop LED Backlight | Backlight Failure

We have captured and published a couple of videos related to repairing LCD backlight but this one is a bit different ;). On the video below, the laptop has dark backlight and the LVDS flat cable has a problem. The dark screen doesn’t get solved...

23 Jul
0
Disabling Onboard RAM of V5-572G Laptop

Disabling Onboard RAM of V5-572G Laptop

Disabling onboard RAM of V5-572G laptop is tested and approved by Dr-Bios.com technical team and the solution is also shared on the website for the first time. Enjoy 🌸💚 ASPIRE V5-572G MODEL NO:ZRK DA0ZQKMB8E0 REV E ZQK

22 Jul
3
Macbook Pro A1286 DIS TO UMA

Macbook Pro A1286 DIS TO UMA

In this article we’re going to show you how to convert MacBook Pro a1286 2011 - 820-2915 Dis to UMA by applying some simple changes. All you need to do is to remove Graphic Chip and connect wire exactly as shown in the pictures.

22 Jul
0
How To Measure Drawn Amperage Of Systems

How To Measure Drawn Amperage Of Systems

Sometimes a power supply or an adaptor has no power to boot up your system but you want to know how much current your system needs to switch ON?! In this kind of situation, you need to measure drawn current of the system using a multimeter. In...

22 Jul
3
Solve "Manufacture Programming Mode Is In Unlock Mode" Error

Solve "Manufacture Programming Mode Is In Unlock Mode" Error

We usually face “Serial Number” or other similar errors after programming Bios in HP laptops. We have a video on the website in which we have fully shown you how to solve the error. But the problem is that in newer devices, we face “Manufacture...

22 Jul
6
How To Solve CPU Power Voltage Absence In Z570 Lenovo Laptop

How To Solve CPU Power Voltage Absence In Z570 Lenovo Laptop

In this video, we have a Z570 Lenovo Laptop which switches ON as soon as plugging in its adaptor. All the voltages are present except for CPU power voltage. We’ll check CPU power block and you can see how to remove and test capacity of...

22 Jul
0
How To Repair Backlight Problem In Fujitsu AH54

How To Repair Backlight Problem In Fujitsu AH54

In this article we have a Fujitsu AH54 laptop that turns ON but with no backlight on display. As there this model didn’t have any schematic files, we had to use LED panel to recognizing jack pins and solve the problem. This laptop has 3 problems...

21 Jul
0
How to Change Mac Address on Modems

How to Change Mac Address on Modems

In this article we are going to teach you how to change the Mac address on Modem devices :giggle: 💚 Most of the times, to solve software problem of a modem, it is necessary to program Flash IC inside a modem by programmers such as TNM 5000. So...

19 May
1
How To Repair Monitor Part 15 T-CON Board

How To Repair Monitor Part 15 T-CON Board

This is the 15th video of repairing monitor in which we have analyzed the important and complicated board of screens, T-CON board. In this video you’ll be familiar with the concept of image processing and showing image on Full HD screens. On this...

10 May
3
Macbook Repairing Tutorial Part-2 Charging IC ISL6259

Macbook Repairing Tutorial Part-2 Charging IC ISL6259

This is the second part of MacBook repairing tutorial videos in which we’re going to continue talking about the concept of MacBook schematic reading. And in this video we have analyzed Charging Microcontroller function and see how it works in...

03 Mar
4
The Importance Of The Table Of Voltage Rails In Laptop Repairing

The Importance Of The Table Of Voltage Rails In Laptop Repairing

What to do when a laptop turns ON but there is no dispaly? The table of voltage rails is available on the second or third page of most schematic files. This table is very valuable for repairmen because it shows the presence of different...

27 Feb
0
How To Repair Monitor 14- Repairing LG W2286L

How To Repair Monitor 14- Repairing LG W2286L

The monitor we have on this video is LG W2286L with LED screen. The monitor is OFF and power LED blinks every 2 seconds and so much work is done on the mainboard. By watching this video you’ll see the troubleshooting process- ohm check and volt...

20 Feb
0
About Laptop Components Part 3 Power Mosfets 3

About Laptop Components Part 3 Power Mosfets 3

As a follow-up of the two previous parts on analyzing the obligations of Power MOSFETs in laptop power circuits, today you will learn about the obligations of High-side and Low-side MOSFETs. By watching this video, you will learn how complex...

18 Feb
0
MacBook Motherboard Repair Course Part 1

MacBook Motherboard Repair Course Part 1

How To Read Macbook Schematics- Part 1 Today we are pleased to have Hossein Asadollahi back on Dr-Bios.com's technical team to share his experience and knowledge as a MacBook Repairing tutor. As you know, the schematic of MacBook and other...

13 Feb
0
Not Booting Up Problem In Lenovo G500

Not Booting Up Problem In Lenovo G500

Today’s laptop is Lenovo G500 which hangs in the logo when it turns ON. It was taken to another repair shop before and its Bios has been programmed a couple of times! Because when laptops hang in the logo, it means that the booting process...

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