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Monitor Makeover Part II

Page: 3/5

Part B- Changing the LED(s)

Materials
- 1 bi-color LED or 2 regular LED?s of your chosen color and brightness.
- Soldering equipment
- De-soldering equipment
- Screwdriver
- A friend
- Paper and pencil/pen or a camera

For this part, you will need a piece of paper and a pencil/pen or a digital/Polaroid camera to take pictures of connectors. Even if you think you can remember them all, copy it down anyway. You will also need a friend to help hold the monitor while you pull off the circuit board.


The Process
Start by taking off the cover and discharging your monitor (see above guide on discharging monitor). Next locate any connections between the cathode ray tube and the circuit board, write them down or take pictures of them, and disconnect them. There may be several grounds screwed/soldered between the 2 parts. Unscrew/de-solder them as well. These 2 are particularly difficult, but any good electrical geek (which I hope you are) should be able to get them. It?s better to de-solder on the CRT side than the circuit board side.


Have your friend hold down the base while pushing outward on the 2 tabs that hold the circuit board in place. Next, lift the circuit board straight out of its holders and place it on your table/bench. Make sure you don?t get stuck under the metal cap around the top of your CRT, as you could crack the CRT. Once you finish this, your friend is no longer needed. This guide has pictures of changing the LED in case you weren't able to get the circuit board out of the monitor (or were too afraid of damaging your monitor). If this is the case, you will also need a set of hemostats/needle-nose pliers and possibly your friend again.

Locate the LED on your board. It will probably have a holder/extension.


Get a firm grip on it (this is why hemostats are better than pliers) and de-solder one side (or if you have a de-soldering iron/tool, just de-solder it). De-solder the other side and the middle, and set your circuit board aside.

Take your LED holder and get a LED. You now have 3 options: Replace the LED with a bi-color LED, replace it with 2 LED?s sharing a cathode, or replace it with 1 LED and lose the ?Suspend? or ?On? LED, as I did. Before you remove the LED from the holder, check to see which side is hooked up to which hole. The middle lead is the cathode (ground) and the sides are anodes. One side will make green, the other orange. If you know which side/which hole is which, it makes installing (a) new LED(s) a breeze, as you know which side of the holder to use for which color.


To test the colors, with the LED still in the holder, put the middle lead on the negative terminal of a 1.5V battery and test each side. Figure out the corresponding color/side, and write it down.
?????

Place your LED(s) in the holder with the cathode(s) (shorter leads) in the middle. You may have to clip one cathode and solder them together for it to fit through the hole. Place the 2/3 leads through the corresponding holes in the board and line up the holder, and solder them back in. Make sure you don?t solder them together. Clip the leads when done.


Now for installation of the board, just do the reverse. Hold the tabs open, slide the board in until it clicks, connect the wires between them, screwing and soldering together as necessary, and you?re done. Connect your main anode back up and put the cover back on, and fire that baby up.

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