Inspiron 1300 battery

I believe that is the battery light indicator saying that the battery is depleted. If you've attempted to recharge the laptop, I'd put my money on a bad AC Adapter. Try a different AC Adapter. Dell laptops are very picky, so I'd recommend acquiring a Dell-brand adapter to ensure it will charge your battery.

Turn OFF the laptop, unplug the ac adapter and remove the battery.
Without the battery and ac adapter, hold the power button for 10 secs.
Put the power sources back and turn ON.

If the adapter is new or OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

If a new DELL ac adapter (3rd party Adapters are not recognized and the charging circuit is disabled) and a new battery doesn't resolve then the charging circuit on the motherboard is bad

remove battery check if laptop works fine with ac adapter, if not then download the latest bios version first if fails then replace ac adapter. If laptop works fine with ac adapter. but cannot work with battery alone, download the latest bios then charge the battery for 6 hrs. if still batt not charging then replace batt. but as you mentioned you already replaced the batt and your still getting the same issue. replace motherboard.

sounds like your charging circuit isn't working or the adapter isn't putting out enough power or amprage to fully charge the battery, or you battery went bad. if the charging circuit is bad then so is *********** board, time to burry the system and buy a new one

ac/dc convertor board inside laptop faulty.

Is the laptop working without the battery, directly on AC. Have you tried using another charger or battery to see if its charging.

Hi!

It's your ac adapter that is causing this issue. The ac adapter doesn't supply enough power or doesn't supply any power at all to the battery. Try to borrow another ac adapter from any inspiron system and if that works, then you need to replace the ac adapter, else, it's the motherboard.

Hope you find it helpful.

Thanks,

Karlox™ :)

possible when the old AC adapter blew it took part of the power management circuit with it, This is the circuit that detects and charges the battery, I'm not sure whether this a seperate replaceable daughter card or whether it is part of the main motherboard. you will need to investigate this (or send it for a service)