Step 1:  
 - Remove the battery. - Turn on the laptop.
- If it works is that the battery is defective and causes a short circuit.
- If the problem persists, proceed to next step.
  Step 2:  
 - Check the external power supply: if possible, test another - If the problem persists, proceed to next step.
  Step 3:  
 - Check the internal power connector: the connector that connects the external power supply. - Check with the tip of a pencil, it seems to have the game
- If yes: it is faulty or soldered and it will replace.
- If it appears in good condition, proceed to next step.
Step 4: identification of the failure at this stage becomes more difficult. These may include:
- From power connector that no longer works: a visual can not be sufficient and must be tested.
- The motherboard is HS.
- CPU is HS (rather rare).
 
  
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