Hey guys!
I'm new here and hope you could help me out.
Anyhow, on to the problem, so I needed to replace a fried LED light on a circuit board the other day, so as usual, I added some fresh solder to the joints, and used my solder wick to remove it all and then just used my fingers to remove the LED. Here's the problem, after I inserted the new one and tried to apply fresh solder, it just didn't stick to the board! (like at all!) and it was just loose (I've desoldered/resoldered components many times before and this never happened to me before!) anyways, so I tried a workaround, I added solder from both sides of the board (LED legs from the other end too) and it finally sticked! But then when I turned on the device, the LED did NOT turn on (while the other ones did! - it's a simple cable tester) and I know for a fact the cable is fine (continuity tested) and I got the LED polarity correctly done too (it's marked on the board, also I checked the LED with a multimeter on diode mode and used a marker to mark the positive leg of it) Few more things I'd like to mention:
1. I use a 0.8MM 60/40 soldering wire, which according to the label, has some flux in it, but probably not much.
2. I never used a standalone flux (or soldering paste as some may call it) as I didn't had the use for it.
3. Normally, after I use my wick for desoldering, the surface remains smooth and silver in color, this time however, the surface had a different color, more like honey, or light brown (flux possibly?)
So basically, I think I may have somehow managed to suck out the internal solder, or flux from the joint.
I'm thinking of buying flux, then putting it around the joints, plus dip the LED legs in it, and then resolder it and hope for the best!
My question is, what are the odds that this will correct the internal contacts?
Did any of you ever encountered this problem before?
All help would be greatly appreciated.