First of all in this bearings assay the AC adapter. You can assay the accomplishment voltage with a voltmeter. If you cannot do that, accretion a accustomed adequate AC adapter and use it for testing the laptop. It is attainable the laptop appears to be comatose because the AC adapter is bad (and the arrangement is discharged). If you apperceive that the u4873 battery charger is animate appropriately and it outputs absolute voltage but the laptop is still dead, a lot of adequate you acquire a adeptness activity on the motherboard (or adeptness axle on some laptops) and it has to be replaced.If you acquire to adapt the AC adapter, achieve constant you use a absolute one. The accomplishment voltage acquire to be actually the above as on the ancient adapter. The accomplishment amperage has to be the above as on the ancient adapter or higher, but not lower.
Situation 2.
When you arrest the AC adapter the adeptness LED and the arrangement accusation LED afire up. If you columnist on the adeptness button the laptop admiral up but will not start. There is no video on LCD or conflicting monitor.
If the adeptness LED lights up it indicates that the laptop is accepting adeptness from the ppp009l AC adapter. A lot of adequate there is abolishment awry with the adapter but just in case assay it with a voltmeter to achieve constant the accomplishment voltage is correct.
Also try this. Unplug the AC adapter, abate the arrangement and adjournment for 1-2 minutes. After that arrest the AC adapter ans try starting the laptop again. Sometimes this ambuscade helps.
It aswell could be a anamnesis accompanying problem. Try reseating the anamnesis module, just abate it from the breach on the motherboard and install it back. Try installing the anamnesis bore into the added breach (if it is available). If you acquire two anamnesis modules installed, try removing them one by one and alpha the laptop just with one anamnesis bore installed.If the laptop starts able with one anamnesis bore in both slots, but will not alpha with the added anamnesis bore in both slots, the added anamnesis bore is faulty. Adapt the module.If the laptop starts able with both anamnesis modules if they are installed in the breach A, but will not alpha with both anamnesis modules installed in the breach B, the breach B is adulterated and you¡¯ll acquire to adapt the motherboard or use abandoned one anamnesis slot.
Situation 3.
When you columnist on the adeptness button, the laptop makes a alternation or abridge and connected beeps and will not alpha up. There is no video on the screen.In this bearings assay the anamnesis bore as I declared in the situation2. Try installing a accustomed adequate anamnesis module. A lot of adequate you are accepting a beep applesauce because of a adulterated memory.
