Power keep recycling on Dell notebook.

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I had this problem on my Dell Inspiron 3800 (P3-700).

Yesterday, my old trusty notebook went dead. Initially the PS/2 mouse
failed, and hours later the notebook unable to boot-up with A/C power.
I remove the battery and AC plug.
And whenever I slot in my notebook battery, it keeps power recycling
every 3-5 seconds.
The panel 3-4 LED would stay lit for about 4 sec, then off, when its
lit, i can hear the
notebook harddisk spinning, then off. It keep power recycling without
reaching the POST screen.

When I plug in the AC power, the power recycling stop, the notebook
just remain dead, but the charger LED do blink every 4-5 sec,
indicating battery charging.

I had opened up the notebook, check the usual fault-prone DC-DC charger
After few hours, I gave up and left the unit to charge up its battery.

But many hours later, when I tried switch it on, suddently the notebook
went back to normal
operations. Anyone know what the cause of this problem? Even the PS/2
mouse is working again.

Initially I thought it would be the DC-DC charger board, but if its
i believe it could not able to power it up again, nor it will charge
the battery.

Now I am in a dilemma, whether to get a new DC-DC charger board, or a
second-hand motherboard, or even the processor card if i knew what the

I would appreciate some help from guys know a thing or two about Dell


Re: Power keep recycling on Dell notebook.

ultrakiasu@gmail.com wrote:
Quoted text here. Click to load it

The fact that the notebook started after an extended charge possibly
indicates a failing CMOS battery, but that could be caused by a fault in
the power board that prevents its charging.  I would first replace that
battery on the chance that it is the culprit, then move on to a power
board replacement.  Can you determine if the AC adapter is OK?


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