This weekend we have this lovely Lenovo Yoga laptop which had an unexpected problem. It went to sleep and never woke up.
When the power button was pressed there was no response from the laptop, neither there was a charge on the Lenovo laptop charging port.
We were expecting to find terrible corrosion on the motherboard or faulty charger which may have shorted a power chip on the board. But this was a different case. A case which we haven’t seen in quite a while.
The way how modern laptops are designed these days is to reduce components on the motherboard. And the way how they can achieve this is to rely on more complex IC chips which holds multiple modules and only need a small number of passive components around them to customize them for the particular configuration.
Not turning on Laptop repair service we offer here in Adelaide includes a couple of simple steps:
- Get a Quote for the repair before any work is done, even over the phone.
- Free pick up from the client’s location in Adelaide. Or alternatively, drop in for a quick check while you wait.
- Confirming final cost and “Go” from the client.
- Repairing and ensuring everything works as expected.
- Returning repaired system back to the client. Or the client can pick it up from our workshop.
We start measuring voltages going into the system and was hoping that it is a simple broken charging port. But quickly we identified that power reaches the system, which eliminated faulty power jack.
The customer was next to us when we narrowed the issue to motherboard related. We have quickly informed her of what we need to do in order to repair it and gave a quote on the spot.
Although this laptop was 3 years old and quite beaten up, the customer knew that she needs to spend 3 times the repair to buy a new one. And rather buying another laptop which may experience this problem out of the blue, she decided to save some money and also contribute to the environment waste reduced by having hers repaired.
We start working on it straight away. Expected 5V line voltage was not produced from the voltage divider. Having the schematic of this model was very useful and from experience, we knew that capacitors on budget laptops are not of the best quality and they fail quite often.
However, to find which one out of 100 capacitors on the same trace is shorting was finding a needle in a haystack. So we start chasing the rabbit down the holes to figure out which capacitor was shorting.
We had to inject voltage to the system in order to determine where the short is. This is a technique allowing high current with limited voltage to go through the component with the lowest resistance. A component which has the lowest resistance will pass through the current first and faster. And when that component is a capacitor, that current will rush to go straight to ground causing a short.
Injected voltage showed that the 5V line was pulling more than 3A current when the laptop even wasn’t turning on. This was clear that there is a short on filtering capacitors. Their purpose is to smoothen the voltage ripples and ensure stable voltage.
Once we identified the capacitor which was heating up like a light bulb, we desoldered it and measured it outside of the motherboard.
Measuring the capacitor showed immediate short and very low resistance which was causing that high current drainage.
We have thousands of components in stock and by the time we identify the problem, as long as we have the components in stock we can replace it.
Locating a replacement capacitor was easy, due to our big component stock. Soldered it back to the faulty one’s place. These are 602 package SMD capacitors. smaller than a rice grain. Soldering them on a motherboard requires high heat of about 400*C and a steady hand.
Once short removed from the board, the voltage regulator starts producing 5V output as expected and allows the laptop to turn on
The last step was to assemble and test the laptop. We ensure that all Lenovo repairs run functionality tests and overnight streaming tests to ensure the stability of the laptop.
Repairing this Lenovo Yoga was a breeze, we are so used to repairing liquid and water damaged Macbooks, that a repair like this brought a fresh breeze to our workshop.
Do you need Lenovo Repair service in Adelaide?
If you have Laptop or MacBook causing troubles and need a Mac repair service in Adelaide, give us a call and we will advise for the best scenario to get your Lenovo repaired.
We at IT-Solve, specialize in computer and electronics repairs. And we will do our best to repair your Computer quickly without involving high costs and long waiting times in repair shops.
Call us now on 0469317177 or drop us an inquiry through our contact form or support @ it-solve.com.au – Our engineers will respond quickly to your inquiry.