my Dell insprion 1501 was showing a messag everytime i turned it on "Battery nor recognised, system will be unsable to charge battery" However, i pressed enter, ignored this messgae and it was fine. the other day i turned it on, had the same message and this time it didnt charge up. The led on the Adapter is still green. someone told be to run a bios from the dell Website (A16 i think), in the process of running this bios my computer shut down and wont turn back on? any solutions? Do i buy a new adapter and Battery? or is it the motherboard? or entirly different issue? Thanks Amanda

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Symptoms summarized: the Inspiron 1501 booted with the message "Battery not recognised, system will be unable to charge battery," the adapter LED stayed lit, and an attempted BIOS update (A16 reported by OP) was interrupted when the laptop lost power and now will not turn on. Earlier replies from and correctly point out two useful observations: an AC-only test is a simple first check, and an adapter LED does not guarantee the adapter is delivering the correct voltage.

Recommended, ordered diagnostic steps and why each matters:

  • Power-reset first: remove battery and AC, then press-and-hold the power button ~30 seconds to discharge capacitors. Reconnect AC (leave battery out) and try to power on. This can clear an embedded-controller hang and is low risk.
  • Verify adapter output: the LED only shows mains presence. Confirm the adapter voltage with a multimeter and compare it to the label, or test with a known-good compatible Dell supply. Wrong or missing output is a common silent failure.
  • Inspect the DC jack and barrel connector for looseness, corrosion or broken wiring; a jack that looks OK but wiggles can fail under load even if the adapter light is on.
  • Reseat/remove removable items: pull RAM modules and try a power-on with only minimum components; bad/loose RAM can prevent any POST signs.
  • Consider BIOS corruption: an interrupted BIOS flash can leave the system unresponsive. Some Dell models have recovery methods, but success varies and many cases need board-level EEPROM reprogramming or motherboard replacement.

When professional service is needed, provide the service technician the exact model, Service Tag, the aborted BIOS filename (A16 if that was used), the battery-not-recognised message, and which tests were already performed (battery out, AC-only, power-reset, multimeter checks). If repair costs approach replacement value for an older 1501, replacement hardware may be the more economical choice.

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Hello,

have you tried the laptop without the battery and just the mains plugged in?

- Let us know how it goes.

yes try without the battery and just the mains, If completly dead and no power than simply replace your laptop charger. This because sometimes the charger can still have its light on but is not sending the power to the connector pin at the end of the ac adapter, We sell the dell inspiron 1501 charger at the location of [snipped]

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