Output is good from AC power supply and with or without the battery installed I get nothing when I try to powerup the laptop. No lights ,whirrs, clicks or other signs of life at all.
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Has the laptop been damaged? Dropped? Same on battery? Remove battery, try AC only. Try another cord/charger with the EXACT same power specs. Reseat Memory mods. Test the DC volt output, at the laptop plug in, with a multimeter. Power issues are difficult to diagnose long distance.
Please check the adpter output voltage with multimeter in DC mode.
If output voltage is good then check any contact problem of the power jack with laptop dc jack for proper contact.
Try to power on with only ac power supply by removing the battery.
1. Please removed the battery and unplugged the power supply. 2. Held down the power button for 45 seconds. 3. After 45 seconds reinstalled the battery and the power supply and pushed the power button and if it works then you don't need to replace your motherboard. 4. Else try it couple of times or up to five times before it worked if worst comes to worst.
Remove your pc battery and try connecting directly to AC supply via your adapter. If you have a multimeter, you could measure your adapter's potential difference to be sure of the right voltage output ok. If nothing happened here, then you should open the pc's RAM compartment and remove the RAM(s). Re-install them properly and test one after another. You could also get a fully charged compatible battery and test alone, ie, without AC this time. If all these didn't work, then the culprit is the power unit. Good luck.
Well I think if you a tester test the battery if it is fine. It is not absolute sure that the battery is fine because it shows it is fine from the laptop.
If the battery is fine then there is something wrong at the connection of the battery with the motherboard.
Can be because power supply is not correct supply or give incorrect supply voltage causing battery to drain or not charge fully,battery can be caput aswell, some laptops doesn't start if battery isn't conditioned properly.
JJ
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