The impact of the laptop may be the tearing off of the main microcircuits, for example, the north or south bridges, video chip. This can usually be repaired if the chip does not come off along with the dimes (contact pads where the chip is installed). There are also methods for restoring dimes.
Necessary
- - microscope;
- - soldering iron;
- - scalpel.
Instructions
Step 1
Determine the appearance of the nickel to see if it needs to be refurbished. If it is empty, no guides will approach it. If the conductor approaches the nickel from the lower layers, there is a metallization of the hole on it, you can solder to it. There are also nickels to which the conductor is connected on the surface. Use additional conductors to restore them.
Step 2
Perform a nickle recovery. Take a scalpel, clean the via from the outside and from the top. Scratch down to the layer where the via and the inner track meet. Take some solder paste to roll the balls, heat them until a small ball appears in the place of the torn penny, its height should be slightly higher than the level of the board. Cut, scratch, flare this ball with a scalpel. Adjust its height to match the level of other dimes, increase its diameter to the usual ones. Wash off the remnants of the flux, proceed to the restoration of the nickels left torn off the board.
Step 3
Find and prepare an additional conductor if the nickels are cut off at the edge and the conductor is on top. If you restore a penny under a microcircuit with a large step and pennies, you can use one core from the MGTfa instead of it, pre-tin it. To reconstruct dimes under shallow BGAs, use thinner conductors. If the wire is in varnish insulation, strip it and tin it, stretch it between a sheet of paper with flux and a soldering iron. Strip the conductor that was connected to the conductor, tin it, solder the additional wire. Make a small ring in place of the dangling nickel. Wash off the remaining flux, replace the BGA. Position the microcircuit accurately, do not press or move it when installing it.
Step 4
Repeat your steps if the result is unsuccessful. If it did not work the second time, then the problem is not only in the torn off dimes, or there are too many of them and the microcircuit cannot be restored.
