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Common problems for Battery
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I’ve been using a second-hand HP EliteBook 840 G3 for the last 1.5 years. I bought it for INR 18k, and it's been working fine with 8GB RAM and a 256GB SSD. However, in the last month, I’ve started facing a weird issue where the screen goes completely black, and the power button stops responding. It seems like the power supply cuts off completely.

At first, I thought it might just be the battery dying, but this problem has gotten way worse in the last week. Now, the laptop shuts off 5-10 times an hour, which is super frustrating. The only way to get it back on is to plug in the charger. Once I do that, the charging indicator blinks, and I can press the power button to turn it on. Interestingly, it doesn’t shut off when charging, but the battery keeps draining, which doesn't make sense.

I’m really frustrated, especially with my exams coming up. Can anyone help with these questions?

What’s likely causing this problem?

Can I fix this myself, or should I take it to a repair shop? I’ve already opened it up to change the battery.

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