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Solve : Laptop wont start.? |
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Answer» Ok so I get this laptop from a friend at work and she asks me to figure out whats wrong with it. If the laptop won't boot to your CD it's due to one of the following reasons: 1. Cd drive probly isnt the 1st boot device by default. 2. I hear it operating when I turn on the laptop. 3. CD works fine I use it all the time. 4. I think this may be more what the issue is. Power light comes on you hear the cd-drive working but nothing shows up on the screen nor does it sound like the lappy it self is initiating any sort of tasks or operations, Even thought it may be the screen so hooked up the cable from my flat screen to the lappy and still nothing. Just took it apart and blew out any dust build up etc. Going to reassemble and try again. If nothing happens guess I give up lolQuote from: DARK9 on March 19, 2012, 03:08:30 PM 2. I hear it operating when I turn on the laptop. Just because it makes noise doesn't mean it's perfectly functional. If you start a car with no gasoline it makes sound, but that doesn't mean you can drive it.Quote
This indicates a likey motherboard-level failure, assuming you hooked the laptop up to the screen correctly. Are you sure you toggled the laptop screen over to the external ? Some laptops may switch over automatically but if not you'll need to use the screen toggle function key. You can also remove the battery and try booting only with the charger plugged in, but you'll have to test the charger first to verify it's outputting correct voltage. Next step at this point is not blowing out dust, but taking the motherboard out and doing a bare bones boot of the system to further isolate the issue. If you isolate it down the the mother board then you've got some things to check, that is if you're up to it. Get a volt meter and while the charger is plugged into the board, put the test leads on the pins where the power jack connects to the board (on the board) to verify that the board is getting power. If the results you get are not the voltage what's indicated on the charger output specs, then you're looking at a power jack repair or replacement. If it's the type of jack that simple plugs into the board it will be easy to replace (no soldering).. If the board is getting power and you still get nothing on screen, a reflow of the northbridge and or gpu could resolve it. I use a hot air rework station for doing this sort of thing but I doubt you've got on of those LAYING around so what you can do it, cover up the motherboard completely in foil, exposing only the north BRIDGE chip and dedicated GPU (is present)... Turn on the OVEN and preheat it to 150 degrees celcius while the board is inside, after a few minutes, increase the temp to 225 degrees celcius for about four minutes. When time is up, open up the oven and turn off. Let the board cool for about an hour and try booting is up again. Make sure you remove EVERYTHING from the motherboard before oven...Including cpu. Might also want to check the board for bad capacitors which are easy to replace. Check for spills and trace damage too, because if any of these are present then you're looking at a short circuit damage which probably permanently damaged one of the chips. |
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