Acer Aspire ES 14 Blank Screen Solution

 Acer Aspire ES 14 Blank Screen Solution

 

This is the solution on how to solve this Acer Aspire ES 14 powering on with Acer logo then it will go to blank screen, as if it hangs on blank screen.

 

Just watch my video and please subscribe.

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Acer One 14 Bios Back Up Bin

 This is a bios dump file back up.

Board id:MBPNCBT414-1320

DOWNLOAD ACER ONE BIOS BACK UP BIN

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Acer ES1-431 No Power Successfully Revived

 

I have here laptop Acer ES1-431 with board id: DAZ8ADMB6D0 REV:D diagnosed as dead-short. First thing first, I carefully and slowly check all component via microscope, and I found suspected capacitor. I removed it and luckily it was the one that is shorted. I test the mother board, and the unit can able to power on but without display.

I successfully fixed the no display by flashing good bios bin file that you can download below.

 

 

 

 

 Here's a video on youtube on how I successfully repaired this laptop.

 

I hope it helps.

 

 

 

 DOWNLOAD TESTED  BIOS BIN

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ACER ASPIRE ES1-432 Tested BIOS Bin

 I personally tested this bios bin file on Acer Aspire ES1-432 with BOARD ID: DA0ZQFMB6F0 REV:F.

 

 

 

 

DOWNLOAD DA0ZQFMB6F0 REV.F BIN

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Toshiba Satellite C655D Bios Password Removal

This is the tested BIOS BIN if you encounter BIOS password on Toshiba Satellite C655D laptop. . Below are some of the laptop's board id pictures/images.

I used RT809F to flash the bios bin file.

IT REALLY WORKS!

Do not forget to back up your bin file before writing.

DOWNLOAD TOSHIBA SATELLITE C655D BIN FILE

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Lenovo Ideapad 320 No Power Successfully Revived

I successfuly repaired this Lenovo Ideapad 320 laptop with board id NM-B242 Rev 1.0. According to customer, they used universal charger and set to 24V causing the laptop not to power on because of overvoltage.

I check for shortage using power supply but it has zero ampere. I dismantled the unit and check if there was a burnt components, but the board was clean and shinny.

I check 19V rail. I measure voltage input of the first mosfet, it has 19V. But on the output side, it has zero volt. I thought the culprit was the 2nd mosfet. But before I checked the 2nd mosfet, i disconnected the jumper PJ301. Then measured the output of the second mosfet if it has 19V. YES, it has! Therefore the problem lies on 19V rail.

So, I downloaded the schematics, and check the 19V rail. By analysing the schematic diagram under page 53, I planned to lift PQ314 hoping that this mosfet was leaking. I lifted the mosfet, then checked 19V at current resistor PR301. Huwaw!!! 19V was there! I quickly replaced PQ301 N-Channel type mosfet. Now the laptop has been revived.

DOWNLOAD

Lenovo Ideapad 320

board id NM-B242 Rev 1.0

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Lenovo Ideapad 120S-14IAP No Display Successfully Repaired

The customer said that this laptop was from US, and upon receiving the unit they complained that there was no display. In my thought, maybe there was a bios program corruption. That's the reason why I flashed it on my RT805F bios programmer. See images below.


Board ID: 120S_MB_V1.0

Back up first before writing.

Then write good bios bin

Now its done.

DOWNLOAD 120S_MB_V1.0

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Acer Aspire E1-531 No Power

I received this Acer Aspire E1-531 from co-tech from Asingan, Pangasinan, comes with no power. The very first thing I checked was if the unit is shorted. I set my 30V power supply to 19V and connect it to the unit, and found out that it's 19V shortage to ground. See picture below.

Almost 1 ampere rating, means there is a short to ground. The 19V line was shorted to ground.

I disassembled the laptop and slowly and carefully saw over my microscope the corroded parts especially capacitors. I saw suspected shorted 3 caps near battery terminal. I removed them one by one and checked but all three are good.  I look at the area near lcd flex connector terminal, I saw 2 suspected caps. I carefully removed them and checked! Viola! One of them was shorted. Got Yah!

After removing the shorted capacitor, the laptop came back to life :)

For info, i didn't replace the bad caps. I just remove it.

now fully working

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How To Repair Toshiba Satellite C850 No Power

I received this Toshiba Satellite C850 with no power, no light indicator. First I connected to 19v power supply to see the current reading. The current reading is zero. Even if I press power on there's no reaction on current.

I disassemble the unit, and check the board if it has a water spill. There's no water spill. I decided to perform voltage checking. I connected the 19v power supply and check the charging flex if there's a 19v coming. There it is. I then check the current sensing resistor if there's a 19v coming, but I only measured zero volt. What came to my mind was maybe 1 of the MOSFETS is deffective.

I measured voltage on the drain of the first MOSFET, there's a 19v. But when I measured its SOURCE, the voltage was almost zero. I doubt that the second MOSFET was deffective. I first measured the resistance of the first MOSFET, and it was good. I then measured the resistance of the 2nd MOSFET, and guess what I have found..... The second MOSFET was shorted!

To make it sure, I remove the second MOSFET. Then voltage check again on the SOURCE of the first MOSFET. There's now a 19v. Confirmed! The second MOSFET was the culprit. And it's an N-Channel MOSFET. After replacing it, the problem was solved.

TESTING

DONE

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ASUS X453SA No Display [FIXED]

I receive this ASUS X453SA with no display after powering on. I decided to program first its bios. After reprogram the display screen blinks. I dismantle the LCD and check its circuit. I found 2 open fuse. Problem solved after replacing two fuses.

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How To Fix HP Laptop With No LCD Light

When power on theres no lcd light. If this is the case I always check the lcd flex pins. As expected, the lcd flex was slightly detached or disaligned from lcd pins. See image below.

What I did was to re-attach it.

Problem solve!

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ACER E5-411 No Power [FIXED]

Laptop ACER E5-41 comes with no power. I checked if shorted to ground on battery terminal and charging terminal, and it was really shorted. Full shorted. I first download its schematic and analyze the circuit. I removed PQ24 and check if the board was still shorted to ground. Stiil yes. Until I realize that the charging ic OZ8691LN is shorted. I removed it. The short was gone. I replace the charging ic with a good ic, but symptoms persist. Im sure that charging ic that i put in was good, so I decided to look for another defective parts. I found out that PU5, the 3.3valw ic was heating up. When i remove it, the short was gun. Finally I replace the ic and the laptop works perfect.

DOWNLOAD Acer e5-411=1=Quanta ZQM_UMA

acer e5-411 schematic diagram

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ACER Core i3 Blinking Display [FIXED]

The only solution for this blinking display if the LCD panel is good is to flash the BIOS. I used EZP2010 V3.0 Bios Programmer.

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Lenovo Laptop No Power [FIXED]

This Lenovo laptop came to me with a no power, no light indicator. In short, no sign of life. I disassemble the unit and check if there's a short to ground on the charging pin. There's no short to ground. The board is clean, and no sign of water spill.

I connected the charger and measure voltages in charging pin. There's a 19V there. I measure input and output voltage of the first mosfet, also there's a 19V. I measure input voltage of the second mosfet, and 19V was also present. But when I measure the output voltage of the second mosfet, there's no 19V there. That means that the second mosfet was damage or open.

Replacing it and the laptop revived!

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ASUS X551MA No Display [FIXED]

This ASUS X551MA comes with a no display on the screen. I fixed it via BIOS Flashing.

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