Acer AL1711 17inch LCD Monitor

I recently acquired a “Acer AL1711 17inch LCD Monitor” which appeared to turn off after 3-5 seconds on computer boot up. But I then noticed,  looking very closely that the LCD screen was still on. The backlight was not functioning.

I decided to take the Acer AL1711 17inch LCD Monitor apart. (Whilst unplugged of course.)

I removed the yellow circuit board and noticed there were four dry solder joints on the board. (Two on each coil.)

So, I used a soldering iron and melted the solder and used a solder sucker to remove any of the old existing solder. I then soldered the two legs back onto the board and made sure it was soldered on both sides of the board.

Once this was complete, I tested the LCD Monitor and there seemed to be no difference in the operation of the unit although I elimated one possible problem.

I began to look into the problem in more depth, researching on google, reading a lot of nonsense etc which was not much help.

So I continued to fault find and noticed the heatsink on the yellow board (Big silver grooved metal thing.):

The heat sink is very close to the four capacitors and two of the capacitors had rounded tops, they looked like they were going to burst.
I decided to replace all four capacitors even thou two looked like a problem. I thought I may as well change all four rather than replacing them in the future if and when they brake.

I ordered four new capacitors which are:

Parts needed:
Note: They need to be a minimum of 105C as the originals were rated at 105C.
2 x 16V 470uF 105C – £2.10 for a bag of ten on eBay inc delivery.
2 x 16v 1000uF 105C – 40p each in Maplin
Total: £2.90

Once the capacitors legs were cut to length and soldered to the board I put it all back together and tested the monitor.

I was very pleased to see this solved the problem and that I had a fully functional second hand 17″ LCD Monitor for £2.90. BARGAIN!!