Aspire 5672WLMi fails to power up

This laptop was used with the wrong AC adapter. Original AC adapter is lost. I tried powering up with bench PSU with 19 V DC but it was no go. The laptop was drawing something around .20 amps when I pressed the power reset which is obviously not enough to get things going.

On eBay I've seen the power jack and cable that plugs into the main board sold as a unit. Is it possible this jack & harness assembly has a power fuse included which may have burned out when a wrong AC adapter was used?

Any suggestions on how to trace the burned out components which I'm guessing is probably located in the power regulation section of the main board?

 

If you are lucky, like I was, you will only have blown the diode on the input, picture shows the power in on an aspire 5920g. Power connector is on the other side of the board and connects to the 4 solder points at the bottom of the pic, diode at PD3 is the the one I blew. If you have damaged more than the diode then likely multiple components will have failed making it nearly impossible to repair.
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Thank you cashman, a picture is worth 1000 words and probably more

 

I just received the new AC adapter - an OEM part, hooked things up and as I expected pressing power reset did not produce any results - no lights, no fan - nothing but silence. I checked the voltage on the adapter which was OK little over 19 VDC.

I started removing screws to expose the board as much as possible. The idea is to take a look at the components around the power jack. If all else fails, I'm thinking of buying a refurbished board from an eBay seller in Hong Kong. So far it's the only Acer board seller I've come across. I got stuck after removing all the screws from the bottom of the chassis and back, bottom of the LCD panel which attaches the top chassis with the three latches. lid. I'm not sure how to remove the keyboard and disconnect the LCD panel. I've removed few easy to get items like the battery, hard disk and can certainly get to the fan and the copper pipe cooling assembly. There are obviously some hidden screws holding the top chassis cover. Any ideas on how to remove the main board will be very helpful.

 

After removing the 3 screws from the back edge of the laptop open the laptop and prise the hinge cover up starting from the left hand side, this will reveal the keyboard screws and lcd cable. Under the keyboard are another 5 screws holding the case together.