Re: Acer AL1917 headache has returned
I soldered the new button switches and put it back together. I think it is fixed this time.
Thank you to everyone who helped with this long saga!
Gregg Hill
greggmh123
Member
Last Activity: 01-17-2014, 12:20 AM
Joined: 09-10-2012
Location: Huntington Beach, CA
-
Re: Acer AL1917 headache has returned
I had already replaced the Volume Up button due it showing 70 ohms when open, so I removed the remaining four buttons, including the power button. The monitor has stayed on for a couple of days so far. I have it sitting with a new power button inserted but not soldered yet. I will see how long that lasts.
Gregg HillLeave a comment:
-
Re: Acer AL1917 headache has returned
Well, I took the problem monitor and set it on a desk, popped off the back, and hooked up a laptop to it to activate the screen. As usual, it worked fine for a while, then started the off/on cycle again. When it came back on, I quickly disconnected the power button board 715G1944-2-AC and it stayed on for hours. If I reconnect the board, it may stay on for an hour, or a few seconds.
Does that really mean that the board is bad, or could it be something else in the circuits that connect to board?
I don't want to inconvenience...Leave a comment:
-
Re: Acer AL1917 headache has returned
selldoor,
The last step in Sept 2012 was "I took all three boards from the problem monitor and put them into the good monitor and it worked perfectly for days. I took all three of the good monitor's boards and put them into the problem monitor, and it too worked fine.
Finally, I installed the power board from the problem monitor back into it, but used the audio and video boards from the good monitor in that problem monitor. I took the problem monitor's audio and video boards and put them into the good monitor...Leave a comment:
-
Acer AL1917 headache has returned
Hello!
The problem detailed in this thread in Sept. 2012 has returned on one monitor: [url]https://www.badcaps.net/forum/showthread.php?t=22517[/url]. The last step noted in page 2 worked since Sept 2012 and just started acting up again.
It is an Acer AL1917 C, version AL1917Cd, model ET.1917B.0DC, built in February 2007. The power board has # 715G1823-2, the video board has # 715G2227-1-AC, and the "button board" (power, volume, menu, etc) is # 715G1944-2-AC.
It will work for several minutes, then turns off. It will not turn back on again... -
Re: Acer AL1917 giving me hard time
Well, folks, I finally got time to test both monitors. I took all three boards from the problem monitor and put them into the good monitor and it worked perfectly for days. I took all three of the good monitor's boards and put them into the problem monitor, and it too worked fine.
Finally, I installed the power board from the problem monitor back into it, but used the audio and video boards from the good monitor in that problem monitor. I took the problem monitor's audio and video boads and put them into the good monitor along with...Leave a comment:
-
Re: Acer AL1917 giving me hard time
Agent24,
It seems like the PSU board has to be the problem, because the screen can work perfectly for hours on end, and then the monitor will turn off completely with no power light at all. The only way to turn it back sometimes is to pull the power cord and wait, then plug it in again. Other times, it will be turned off by using the power switch, then it starts to turn on and off by itself and just keeps doing it until I unplug it.
I'll swap boards this week and see what happens.Leave a comment:
-
Re: Acer AL1917 giving me hard time
Here are some pictures. I think D920 on the back looks odd...the solder looks as though it has melted and is more shiny on on side than the other. It is the diode(?) that is screwed to the big heat sink on the front.
The video-connector board has one area that looks odd on the front at U406. There is discoloring of the area....Last edited by greggmh123; 09-23-2012, 01:36 AM.Leave a comment:
-
Re: Acer AL1917 giving me hard time
Sometimes I get carried away with documentation! Yes, my service managers did love it, and actually won several court cases because of it, even though my work wasn't why they got sued.
I bought the Peak ESR 70, not the Blue ESR, so it came assembled.
I have some motherboards with bulging caps that I can test to see what to expect.
I am not sure what you mean by "PSU and mainboard." It has three boards: one into which the power cord connects, one with an audio jack, and one with DVI and VGA...Leave a comment:
-
Re: Acer AL1917 giving me hard time
I have pictures in JPG format that are all well under the JPG size limit listed, but are over the pixel limit, so I need to resize them before uploading.Leave a comment:
-
Re: Acer AL1917 giving me hard time
Agent24, et al,
All the old ones on the power board were Hermei. All the old ones on the audio board are Hermei, and have not been changed yet. The ones on the video board are Rubycon, something with a king's crown symbol, TL, and T3(?). NO cap is visibly defective.
I got my ESR 70 meter today and measured all the old caps from the power board (715G1823-2), then the ones still mounted on the audio board (715G1841-1-AC) and video board (715G2227-1-AC). The chart in the ESR 70's manual is nowhere even close to the readings...Leave a comment:
-
Re: Acer AL1917 giving me hard time
In case anyone hasn't figured it out yet from this conversation, the problem still exists.
I will do more testing when the ESR meter gets here. The darn thing will work for hours on end, and then start to turn off and on (power light goes off), finally just going off and requiring removing/reinserting the power cord to get it to come back on. It went a full 24 hours once.Leave a comment:
-
Re: Acer AL1917 giving me hard time
Agent24,
Well, I wouldn't really smash it. I would probably tinker for the next six months to try to figure it out, and save it for parts for the remaining three.
GreggLeave a comment:
-
Re: Acer AL1917 giving me hard time
Hmm, my reply did not show up. Here it is again.
I have a Fluke 88 from my previous life as a Ford tune-up tech, so that should work.
My wife has two of the AL1917 LCDs and her Dad has two...all four are identical, bought at the same time. If it gets to the point of the sledge hammer, I will take my wife's remaining good monitor and give it to her Dad so he can have three identical monitors, and then get her three new ones. Both "only" have two now, but want three. I created a monster (or two!) when I convinced...Leave a comment:
-
Re: Proper connections for Acer AL1914 LCD?
I took LOTS of pictures of the AL1917 before touching a thing. On the AL1914, I foolishly thought that I could remember two wire colors!
I hate getting old...but I cannot remember why.
GreggLeave a comment:
-
Re: Acer AL1917 giving me hard time
I have a Fluke 88 from my previous life as a Ford tune-up tech, so that should work.
My wife has two of the AL1917 LCDs and her Dad has two...all four are identical, bought at the same time. If it gets to the point of the sledge hammer, I will take my wife's remaining good monitor and give it to her Dad so he can have three identical monitors, and then get her three new ones. Both "only" have two now, but want three. I created a monster (or two!) when I convinced them that they needed two monitors.
I have...Leave a comment:
-
Re: Acer AL1917 giving me hard time
While waiting for my ESR meter to arrive, I took apart the AL1917 again and took some more pictures. Nothing is obviously wrong.
My ESR 70 should be here Friday. If I still cannot fix it, I will hunt down a local repair shop, or throw another $30 at it and get a new power board. If that fails, I'll take a sledge hammer to it.Leave a comment:
-
Re: Proper connections for Acer AL1914 LCD?
budm,
Some of your pictures show what I remember, with pink on the top of each pair. One of your pcitures shows both ways!
So, I am going to go with what my old brain thinks it remembers...pink on top.
Thank you!
GreggLeave a comment:
-
Proper connections for Acer AL1914 LCD?
The real title of this thread should be, "Take a picture before you touch anything...you idiot!"
I do not remember if the four connectors on the left side (monitor facing down on a table) of the power board had the pink-wire-connector at the top of each group of two connectors or the blue-wire-connector at the top.
Anyway, I opened up my AL1914 to look at the power board to see if it was the same as my AL1917. It is not, but now that I am putting it back together, I forgot the order of those wires.
This person's pictures on an AL1914 board... -
Re: Acer AL1917 giving me hard time
Thank you for the input!Leave a comment:
No activity results to display
Leave a comment: