Hi George,
bad luck! That�s why we professionals get so much money for it. Those "thingies" are mainly capacitors or resistors. If a capacitor is missing you might with luck not even notice it. A resistor, that�s different, you will notice it, what means it doesn�t work any more. Now your problem is to identify the part ( hope you didn�t loose it ). I supect that it�s a resistor and it should be in your case white at the bottom and black at the top with a white number printed on it. This white number gives you the necessary value of that part ( for example: 104 = 10 KOhm ) You just have to find a part with the same marking on the old board, - desolder it (using two small irons with low heat at the tip (250�C -270�C) simultaniously)( don�t put to much heat on it !!! ), - remove old solder from the pads ( that are the both spots where the component needs to be soldered to) of your defect board where the component is missing carefully with solder wick which can be bought at any electronic shop for hobbyists for little money, - clean the area with isopropanol or something similar - apply a small amount of fresh solder ( use thin solder wire with flux core ) to one pad using one (small) iron with temperature mentioned above, - use a small tweezer to hold the component in the middle of the body , - adjust it this way to the desired final position in X-,Y- and Z-axis (just hold in place), - put your soldering iron to the pad with that solder already applied and wait until it gets molten again and is wetting the components contact area ( this should be about 3-4 sec, the time for a good solder joint), - now take the iron to the other pad, use the solder wire and solder the second side ( again: 3-4 sec ...)
This should work for your problem. But if not fit with soldering you might need a little training before you ruin your board totally.
The other method is to look for an electronic shop in your area and ask if they could help you once you have the correct part.
And after all that, pray that it�s gonna work and there�s not much more damage to the board for static voltage discharge ( ever heard of ESD ) or whatever reason.
Good luck
Wolfgang
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