Qosmio G30 No start up Flashing DC-In LED

SOURCE: Flashing amber battery light

Sure, this just mean your are in charging mode, but your battery is at full charge. Should your battery need charging and in charging mode the lights would be green most likely.

Regards,
Worldvet
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SOURCE: Dell XPS M1330 PC - battery not detected

The error code 0146 and the battery are two separate problems. First the battery problem is simple, it's bad and needs replaced. It being bad can refer to a developed short, a fail safe kicked in, or it's simply worn out. It is a battery after all, ad they don't last forever, the more you use them the quicker they wear out. A bad battery causing an issue is vary common with Dell machines, and a false battery reading with a failing battery is also common. The orange flashing battery light is the indicator that the battery isn't working properly, either by fail safe or wear.

The error code 0146 Is from the short test on the hard drive and indicates the a sector is going bad, and eventually the hard drive is going to fail. At this point, your hard drive may last days, or months. Either way, I suggest that you back up all important data, and purchase a new hard drive for the imminent failure. You might even go ahead and set it up, this way you'll be prepared when it does go, and you won't have any downtime.

SOURCE: Hellow Dear, My acer aspire 4935

First, you need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.