In this situation test the laptop with an external monitor. It sounds like the laptop is booting normally (hard drive LED is flashing) but there is no video on the screen Most likely you are getting a beep error because of a faulty memory. Try installing a known good memory module. In this situation test the memory module as I described in the situation2. When you press on the power button, the laptop makes a series or short and long beeps and will not start up. If the laptop starts fine with both memory modules when they are installed in the slot A, but will not start with both memory modules installed in the slot B, the slot B is faulty and you’ll have to replace the motherboard or use only one memory slot. If the laptop starts fine with one memory module in both slots, but will not start with the second memory module in both slots, the second memory module is faulty. If you have two memory modules installed, try removing them one by one and start the laptop just with one memory module installed. Try installing the memory module into the other slot (if it’s available). Try reseating the memory module, just remove it from the slot on the motherboard and install it back. It also could be a memory related problem.
After that plug the AC adapter ans try starting the laptop again.
Unplug the AC adapter, remove the battery and wait for 1-2 minutes.
Most likely there is nothing wrong with the adapter but just in case test it with a voltmeter to make sure the output voltage is correct.Īlso try this. If the power LED lights up it indicates that the laptop is getting power from the AC adapter. There is no video on LCD or external monitor. When you press on the power button the laptop powers up but will not start. When you plug the AC adapter the power LED and the battery charge LED light up. The output amperage has to be the same as on the original adapter or higher, but not lower. The output voltage must be exactly the same as on the original adapter. If you have to replace the AC adapter, make sure you use a correct one. If you know that the AC adapter is working properly and it outputs correct voltage but the laptop is still dead, most likely you have a power issue on the motherboard (or power board on some laptops) and it has to be replaced. It is possible the laptop appears to be dead because the AC adapter is bad (and the battery is discharged).
If you cannot do that, find a known good AC adapter and use it for testing the laptop. You can test the output voltage with a voltmeter. You plug the AC adapter but the LEDs (power light, hard drive light, battery charge light, etc…) do not light up and the laptop will not react at all if you press on the power button.įirst of all in this situation check the AC adapter.
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