Re: Acer AL1916W - Two seconds to black - Voltage regulator problem?



I don't actually have a soldering iron yet. I understand it is possible to work with these tiny components if i get one with a narrow tip but I don't have it yet so unfortunately I can't remove components to test off the board or swap the parts around. I was hoping to combine it with an order for some replacement parts to save on shipping costs, but I am not yet sure what parts I should order

I am confused why that little RC circuit connected to pin 2 of the diodes D504 and D507 would...

Re: Acer AL1916W - Two seconds to black - Voltage regulator problem?



The diodes are so tiny I have no hope to read anything on them to identify what to buy if I was going to replace them, ... Does anyone know how I could find out what part I would need to buy?...

Re: Acer AL1916W - Two seconds to black - Voltage regulator problem?



Thank you for the schematic - you are right that it seems to be very close

I think I have found a problem with the diodes D504 and D507, which seem to be associated to the problematic middle two plugs noted before when i tested the lights. Using my multimeter in diode mode, I found that these two diodes are conducting in both directions, while the other 4 diodes of the same style (D502, D503, D508, D509) are all working normally. Based on the schematic, the diode should conduct through...

Re: Acer AL1916W - Two seconds to black - Voltage regulator problem?

I checked the resistance of all the blue capacitors on the baord. One of them for each transformer gave a reading: C506 was 624 Ohm, and C523 was 615 Ohm. All the others on the board were greater than 200kOhm.

Actually those two capacitors are the same contacts I probed earlier, thinking I was measuring across the transformer (points S1-S1 and S2-S2 on my diagram are joined by a trace to the capacitors C506 and C523). When I did that I was following this post: [url]https://www.badcaps.net/forum/s...

Re: Acer AL1916W - Two seconds to black - Voltage regulator problem?

I tried plugging all four lights into one plug, one at a time, and they all lit up for a second or two before they went out and I turned it off to repeat. Then, when I went to try one light in each plug, one at a time, I found that the two middle plugs both do not work, but the two on the outside do. I was a bit surprised since that is one each from the two transformers if I understand correctly

Hello all. Excellent forum you have here - it has already been a great help to me. I am posting the details of my situation before I go and start buying parts to see what suggestions the great minds here may have on diagnostics or otherwise.

I have an Acer AL1916W monitor which has recently failed in the following way: the screen comes on at power on, but after a couple seconds the screen goes black. Using a flashlight, I can easily verify the LCD is fine but there is simply no backlight.

The power supply board is of the type ILPI-025 Rev C (Date of manufacture was...

Re: New Members - please post your introductions here

Hello. I am interested in dabbling with electronics and found the forum due to the excellent quality troubleshooting advice related to the infamous 2-seconds-to-black issue with LCD monitors. I am having a similar issue and come for guidance.

I am also interested to play with Arduino and Raspberry Pi for home automation. I am a chemical engineer so electronics are a little mysterious to me, but I do have some general understanding.