Having problems with your Acer Aspire 3680 Laptop ?

Acer aspire 3680 won't turn on / Black out.

\015 Does anyone knows about if what components from motherboard should i replace?\015

Answers :

This line of Acer laptop has numerous power issues. If the laptop actually will not power you will likely need to perform some component level repairs. If it powers on but does not complete POST. (Meaning you dont see anything on the screen) Then you would want to begin by removing the center panel on the bottom case. Once removed locate your memory sticks and make sure that they are seated properly. Remove them and reseat them. Try to power the laptop again and see if your problem is solved. It is possible that if this does not work that the memory is actually bad and must be replaced. There are quite a few other things that can cause this. Memory is the easiest to repair. This failure can be caused by a defective CPU as well, but for the average computer user I would not suggest taking your PC completely apart. If you are comfortable doing so you will want to disassemble it, remove the logic board and use a test CPU to see if this solves your problem.
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\015\012In case your unit actually doesn't power on it changes things. The first thing you need to check is the status of your AC adapter. If you do not have a voltage meter you would need to use a test adapter to elimiate that possibility. More likely the problem is caused by an internally broken DC connector. This happens very frequently and is a rather simple repair if you posses decent soldering skills. You can purchase one of these DC connectors from ebay for $2 or so. Disassemble the laptop, remove the two screws that attatch the DC board tp the main board. Desolder the DC connector and replace it with the new one. Sometimes this DC board will have been damaged from a power surge. In this case the entire power plane connected to the back pin of the DC connector will likely be shorted to ground. If this happens remove the old DC connector, cut off the back pin and solder and heavy gauge wire directly to the back pin. Run this wire around the DC board on the left side of the DC connected as you are looking at the connector fromthe front. On the other side of the DC board you will see 2 farite beads wired in parallel. They connect the shorted power plane to the next. Remove these two farite beads and run the wire to the contacts on the next power plane. This will bypass the damage to the DC board.
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\015\012If the DC connector is the the cause for the problem. There is a pair of capacitors on the logic board that fail very often. To see them you will need to remove the heatsink assembly from the logic board. They are ceramic capacitors right next to the CPU socket. They are wired in parallel and may bot show any physical signs of damage. If you have a multimeter set it to test continuity and put both leads on eachside of the caps, if you hear a constant beep then the caps register as shorted. Remove them both from the logic board and repeat this process with them outside the circuit. If you touch the leads to each side of the caps and hear nothing, then the cap is good. If you hear the same continuous beep then the cap is shorted and is the cause for your power issues.
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\015\012If these suggestions have not solved your issue, then the motherboard may still be repairable but will require an experianced technician to isolate the cause for the no power. Good luck.
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