FIXED!!
Thanks to Sabre504 and budm for all your help AND patience! Hopefully I'll get another 7 years out of this monitor.
mikeh1
Member
Last Activity: 07-15-2015, 06:27 PM
Joined: 02-04-2013
Location: los angeles, ca
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FIXED!! troubleshooting DAC 19M008 power supply
FIXED!! Thanks to Sabre504 and budm for all your help AND patience! Hopefully I'll get another 7 years out of this monitor.
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Re: troubleshooting DAC 19M008 power supply
Just got around to ordering the main board. I will post the results once I get it installed. Keeping my fingers crossed!Leave a comment:
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Re: Post your system.......
Got a homebuilt:
Pentium Dual Core E5200 2.5 GHz
Biostar G31 board
2x1GB PC6400 RAM
WDC WD5000AAKX 500GB SATA
Plextor PX-880SA DVD-R
Nvidia GeForce 8400GS w/512MB
Viewsonic VA1912 19" LCD monitor (waiting for part to finish repair)
IBM 42H1292 PS/2 keyboard
Windows 7 Ultimate x64Leave a comment:
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Re: The Roach-top thread
I recently got a free PC from Craigslist to refurb and sell, inside was shredded paper and rat droppings from what seemed like a rat's nest. I blasted away at it with an air hose, then doused it with Lysol a few times and then with Febreeze and let it sit outside for a few days. By the time I sold it, it only had a faint smell of Febreeze.Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
Got it. I was looking for some kind of release like the other two connectors. Guess I'll get another main board since it looks like there isn't much serviceable on this board and the regulators aren't shorting. Found one on Ebay for $10.Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
Is there a trick to removing the speaker/button-board ribbon cable from the main board. The two LCD panel cables were easy enough, but can't see how to disconnect other cable.Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
Just powered it up with the two LCD panel cables disconnected, was unable to disconnect cable from speaker/button board. Fuse popped again. Do I have a bad main board?...Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
Just replaced the F102 fuse, with power supply board not connected to the main board I get 5v at the 5v pin on the main board connector, so it seems to be the main board that's blowing the fuse.
Are there any other parts on the main board that can be tested with power off?Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
I'm going to order some more fuses, this time I'm going to power up the power supply board all by itself, to see if it pops the fuse.Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
found a datasheet for the AMC1117 regulator, the pin I was measuring was pin 1 which is ground, pin 2 and 4 are output and neither regulator is short at these pins...Last edited by mikeh1; 02-10-2013, 06:05 PM.Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
on both U4 and U6, both the leftmost (#2 ?) of the 3 pins are short to ground (using the heads of the mounting screws), could both regulators have gone bad?Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
already got it, it tells me to change the power board...Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
pins 1 to 5,6,7,8 is open
from the outboard end of the fuse to ground is 300 k Ohm, inboard side is 2 k OhmLeave a comment:
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Re: troubleshooting DAC 19M008 power supply
both MOSFETs: pins 1 to 2 measures 29 M Ohm, 1 to 3 is 7 M Ohm, 2 to 3 is 35 M Ohm, 3 to 4 and 3 to 5 is 30 M Ohm, everything else is open (except for 5,6,7,8)Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
sorry, 5,6,7,8 all connected together but not grounded
where can I find the diagram?Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
tested pin to pin on all pins, no shorts other than pins 5,6,7 and 8 on both MOSFETs, since they are all groundedLeave a comment:
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Re: troubleshooting DAC 19M008 power supply
Installed new fuse, tested before applying power, tested dead short. After applying power fuse tests at 210 ohms. Still no green light. What could have caused the new fuse to fail?Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
Excellent idea. Thanks...Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
How sensitive is this fuse to the heat, is there a chance I could fry it while installing it?Leave a comment:
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Re: troubleshooting DAC 19M008 power supply
That's who the Ebay listing was. It's $1.50 and free shipping...Leave a comment:
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