Archive for the ‘Things You Should Know’ Category

Most common laptop problems

Top 10 most common laptop problems. 1. Laptop won’t power on at all. 2. Laptop runs hot, fan runs on high speed. 3. Laptop freezes and shuts down after running for a few minutes. 4. Laptop powers on but screen is blank. 5. Laptop LCD screen cracked. 6. Laptop LCD hinges are loose. 7. Laptop […]

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How to recover data form laptop hard drive.

Your old laptop stopped working.  You’ve just bought a replacement laptop and now you are wondering how to get your valuable pictures and personal data transferred from the old hard drive to the new laptop. 1. Get a USB external hard drive case. IDE or SATA based on the type of drive you have. Cost between $5-$10. […]

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How to replace LCD hinges on a laptop.

Note: when looking for replacement LCD hinges make sure you match the part number. Even the model matches the hinges might not fit. You can usuall find the part number on the hinge itself.

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Disposing of a Battery

Rechargeable batteries are considered a hazardous waste and should not be thrown in the trash. Take them to your nearest recycling center or hazardous waste disposal facility. The Web site below has an extensive list of retailers, such as Sears, Wal-Mart, Home Depot, and Radio Shack, who will take your battery and send it to […]

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Reason why not to buy aftermarket power supply

There are a lot of cheap generic chargers out there that are missing important safety features. Here’s a link to a page where someone disassembled an imitation Dell charger, and it wasn’t pretty. http://www.electricstuff.co.uk/acadapter.html

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HP DV2000 DC connector.

DC jack on HP DV series is not part of the motherboard. The jack is connected to the motherboard via cables.  Replacing the jack on the model does not require soldering.  This video will show you how to remove and reinstall the DC connector.

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MOSFETs and Caps voltage rating.

Most MOSFETs are rated at 30v, should be able to handle up to 24v with no problem. Caps are rated at 25V, MAX1772 charges the battery can handle up to 28V, MAX1999 main PSU controller is rated for 24V.

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Replacement motherboard

When buying replacement make sure to buy one with the exact same part number. Even same model may have different motherboards.  See example below. Both are to for the same model.

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Common components on laptop motherboard.

Inductor

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Buzzing niose

A bad choke coil usually makes a buzz noise. If the noise is a whine the problem is usually a capacitor.

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