Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Well, in conclusion here, it seems the issue was actually the backlights all along. If I took good working backlights from other stuff and plugged them in to either of the test boards I had they would stay on. Not having any way to purchase backlights for them all I gave up actually repairing them, but I feel I did figure out the real problem.
Aeridyne
Member
Last Activity: 02-20-2020, 05:33 PM
Joined: 01-14-2017
Location: Flint MI
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
I will try those three suggestions and post back soon. Knee deep in a home movie project for someone atm.Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Ok. Not sure how to go further in depth myself. That V reg was as far as I had gotten.Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
It seems to be working. Measuring with orientation as the fat tab north & the black lead on the left leg (ground), the right most tab shows 4.97V and the center pin and the fat tab / output both show 3.27VLeave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
sorry, I don't know how to delete, I refreshed the page multiple times but I didn't see your reply until I had posted, I will check it according to the new information you have provided.Last edited by Aeridyne; 01-18-2017, 10:35 AM.Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
U101 is
A1
AS1117L-33
B0815 D1
it measures, with black lead on top "fat" tab, from left to right
3.2V / 0 / 1.8Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Its being a punk and won't display on the 98 system at the moment either, goes right back to black after 5 attempts to turn off/on. I can catch it while the lights are on briefly though and pin 5 shows 3V at that time.Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
thanks Budm, I didn't even noticed that the power output from the power/inverter board to the vga board was labeled! Good eye!
Ok so the Pin 1 & 2 says 5V and they look good. Pin 6 looks reasonable and the pin 5 / BL-ON pin has nothing, the power led is blue, back lights are off.
pin 1 4.9
pin 2 4.9
pin 5 (bl-on) 0
pin 6 (brightness) 2.67Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Having a tough time getting really good pictures, my camera isn't the best and it's really overcast today so outside is actually worse. I hope these will do. If not I can try again for whatever you need to see better....Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Thanks for the replies, I've checked the refresh rate and it does not seem to matter what it is set to. These monitors are not ancient, they are LCDs from about 08 and capable of max resolution 1280x1024 I believe, they should display just fine on a wide range of systems just like any other would. Win 7 auto adjusts to the display. I've had them hooked up to 4 different systems and the only one that will display is the 640 res most of the time, not always, sometimes have to turn it off and on to get...Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Another update, I went and got two more out from the basement and they seem mostly repeatable, but not exactly the same.
#3, I first hooked up to the 98 system at 640res, it displayed and stayed on. I then while still powered on, unhooked the VGA from the back of the 98 computer and hooked the monitor to a 7 computer, it stayed orange, as if not detecting the signal. I then pushed the power button twice turning it off and back on again and it then seemed to sense the signal, the power button...Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Oh, also Budm, just re-read your reply, blue light stays on, it thinks there is a signal, it just stays black though. Not sure what to do or how to do whatever I need to try next.
The only theory I had at this point was the really low res / low color mode somehow gets past something failed, but I really have no idea. (On the other hand it occurs to me that bios screens should be very low res & low color as well, and those do not display either.)Last edited by Aeridyne; 01-16-2017, 11:24 PM.Leave a comment:
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Re: Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
Pete, they came from a local school, they generally just set stuff aside when it does not work anymore and it goes to me, so I don't really have a detailed history of what they did before I got them. I did have a few of these same model, a few were white that did work, I no longer have them though. Wish I did, I'd have been swapping parts and praying most likely :P
I thought of this possibility, but I have no idea how to pursue how to test or potentially fix that particular...Last edited by Aeridyne; 01-16-2017, 08:41 PM.Leave a comment:
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Six Acer V173 LCD monitor all with same problem, only display Win 98 640res
I get the second flash to black issue on these mostly.
These are all Acer model V173 monitors. They all basically do the same thing, or I can't recall but a few might not power up at all. If important I can plug each of them in again and double check.
On the two that I've been focusing on, they do the same thing. One had one clearly going bad cap, the other one's power board looked totally fine. I replaced all but the two smallest on the board that had the one bad one on it. And on the other I did the one big cap anyway. (I then tested the removed cap that looked fine...Last edited by Aeridyne; 01-16-2017, 07:11 PM. -
Re: Dead Power Supply(XAD819AR) for Acer AL1706
Little update, on one of the AL1706b monitors, this was one that would not turn on at all. Totally dead. None of the caps look bad on it. Tried plugging in different ccfl lamp to each of the 4 outputs, no change, still wouldn't power on. I think the issue with this one could be different from the others.
On one of the V173, the ones that I can usually get to display a 98 640x480 image if I connect it and then turn it off and back on again, I had one all disassembled and tried the same thing with the lamps, when I plugged...Leave a comment:
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Re: Dead Power Supply(XAD819AR) for Acer AL1706
I see this thread is a bit old at this point but I must revive it and it seems the most fitting place on the net for the question...
I have two Acer AL1706b monitors and six Acer V173 monitors.
They pretty much all do the same thing, plug it in, power led will come on. If connected to computer, power led changes from orange to blue. If not connected, most of them show "no signal" clearly. They also will show logo clearly when first powered up. Some do not, but power led is same behavior on all....Leave a comment:
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