How to open laptop charger

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Several days ago the HP netbook went dead again, power supply tape fix is not working anymore, exhausted trying to wiggle the strain relief and cable wire.  Tape fix was not elegant to look at but it worked.

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The strain relief is the rubber on the cable wire after the main power adapter box. So I was able to pinpoint the problem and just wiggled the strain relief and then taped it to position so it wont move that much. After some googling it turns out this is common on HP laptop power adapters, there is a break going either on the pin side plug or the strain relief. Luckily it turns out the battery was drained and the power adapter was not working to charge it.

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The warranty was out and thought of the worst like motherboard failure etc. Got my wife one of those netbooks HP 2140 last year, the last couple of months it suddenly won’t turn on.