Louis Rossmann's rants, tips, and ideas on the laptop repair industry.


Posted Friday, October 14, 2016

There are no shortcuts around component level repair.

Posted Saturday, August 6, 2016

I see many people pointing to dry boxes, thirsty bags, and other hip new “tools” that supposedly fix liquid damaged devices. The reality of the matter is that a burned out component is a burned out component no matter what you put the device in afterwards! Look at the pictures below. Besides replacing the broken components Read More

I started an IAMA on reddit today, and yes it’s me.

Posted Saturday, June 11, 2016

Just incase anyone doubts!   https://www.reddit.com/user/larossmann  is me

Our store’s location

Posted Monday, May 23, 2016

No appointment is necessary – come by during our open hours and we are happy to help you! The Rossmann Group – Manhattan186 1st Avenue New York, NY 10009 (347) 552-2258 Monday-Friday – 12 PM to 8 PM Saturday-Sunday 12 PM to 4 PM  

Macbook Pro Retina water spill no video repair

Posted Saturday, February 6, 2016

This Macbook Pro retina logic board has no output on the internal screen. However, using a displayport to VGA adapter, I was able to get a picture to show upon an external monitor, and I was able to run ASD. ASD gave me an error, displayport symbol error. I investigated the displayport data lines and Read More

Macbook logic board repair, short detection

Posted Thursday, January 28, 2016

Here I go over how we troubleshoot a short to ground on PPBUS_G3H, a main power line on the Macbook Air logic board. Here we have an issue where the CPU vcore circuitry. Many people use the word “short circuit” to describe any type of non-functioning circuit, whether or not it is a short circuit! Read More

Amtech NC-559-V2-TF flux for sale!

Posted Sunday, December 27, 2015

In most of my motherboard repair videos, the flux I am using is Amtech NC-559-V2-TF. A lot of people have asked what flux I am using because it makes the job so much easier. Even if I tell you what it is, I have not done the hard part of your job in locating Amtech NC-559-V2-TF! Read More

What is error 53?

Posted Friday, October 2, 2015

Error 53 is something often discussed online, without much information. Some think it is just an issue when you change the home button on an iPhone 6 or 6+. It isn’t. You can get error 53’d even with the original home button. Error 53 is Apple’s way of monopolizing the repair of their products at Read More

Common onewire circuit ailment on older Macbook Pro logic boards.

Posted Friday, June 5, 2015

One of the common issues is that liquid gets in along the vent and touches the board since there is no protection, and there are components along the vent that are very important. The onewire circuit is what allows the charger to speak to the SMC so it can give it the go-ahead to allow Read More

What is a voltage divider?

Posted Tuesday, May 5, 2015

A voltage divider is a series of two resistors one can use to lower an input voltage to your desired voltage. Let’s take the BKL_EN circuit, for example. Many circuits inside of a laptop don’t come on until they see voltage at their enable pin – think of the enable pin like their power switch. Read More