Hey, thanks for reading. I have replaced all the caps on the power supply except the large one; it tested 170v. Fuse has continuity. I then replaced the two largest caps on the signal board, used two 25v caps in place of a 10v and 16v 470uf caps, cause that's what I had. All are low-esr caps except for the 1000uf 25v that I only had an NIC general purpose (NRWA series) cap for. I figured it should still work until I can get a low-esr model ordered, but someone might tell me if that is so or not. The Kemet are a little unusual, but are supposed to be low esr as well (ESC series).
I did not replace the small caps all over the signal board.
I am just learning to troubleshoot more components than simply replacing caps, so bear with me if you would.
So, when plugged in, after replacing the caps, I get the Gateway logo, and no screen. Shining a flash light shows the image there, so I suspect the inverter side is ok. It even flashed on once or twice as I keep trying it but would not come on completely.
Testing I have done so far:
On the power board, plugged in to power, the pins on the connector to the signal board read:
1 - 0
2 - 0
3 - 5.0
4 - 5.0
5 - 5.0
6 - 5.0 (seems to connect to a USB board)
7 - 0
8 - 0
9 - 0
10 - 0
Seems like there should be more power there from looking at other posts testing these connectors on various monitors - maybe 9 and 10?
Next I tested what I could find to do on the signal board.
Tested for C-E shorts on two transistors, Q605 and the tiny one behind the dvi connector, can't even find a number on the board there. Ok.
Four Voltage regulator's on signal board:
#1
AIC
1084-33PM
24117
pin3= 5.0
pin4=3.2
#2
AI
AS1117R-18
B0 536
pin3=3.2
pin4=1.7
#3
AI
AS1117L-33
B0640 97
pin3=5.0
pin4=3.3
#4
EH14A
631J28
pin3=5.0
pin4=2.4
At this point if someone could look over these readings and advise me I would greatly appreciate it.
The last thing is a resistor with a little chip in it, pic included. Have not tried to remove and test, have not done that before, but willing to try if I can find a resistor chart and figure out the color code (L to R= white-gold-silver-black-red).
Thanks in advance!
Tom
I did not replace the small caps all over the signal board.
I am just learning to troubleshoot more components than simply replacing caps, so bear with me if you would.
So, when plugged in, after replacing the caps, I get the Gateway logo, and no screen. Shining a flash light shows the image there, so I suspect the inverter side is ok. It even flashed on once or twice as I keep trying it but would not come on completely.
Testing I have done so far:
On the power board, plugged in to power, the pins on the connector to the signal board read:
1 - 0
2 - 0
3 - 5.0
4 - 5.0
5 - 5.0
6 - 5.0 (seems to connect to a USB board)
7 - 0
8 - 0
9 - 0
10 - 0
Seems like there should be more power there from looking at other posts testing these connectors on various monitors - maybe 9 and 10?
Next I tested what I could find to do on the signal board.
Tested for C-E shorts on two transistors, Q605 and the tiny one behind the dvi connector, can't even find a number on the board there. Ok.
Four Voltage regulator's on signal board:
#1
AIC
1084-33PM
24117
pin3= 5.0
pin4=3.2
#2
AI
AS1117R-18
B0 536
pin3=3.2
pin4=1.7
#3
AI
AS1117L-33
B0640 97
pin3=5.0
pin4=3.3
#4
EH14A
631J28
pin3=5.0
pin4=2.4
At this point if someone could look over these readings and advise me I would greatly appreciate it.
The last thing is a resistor with a little chip in it, pic included. Have not tried to remove and test, have not done that before, but willing to try if I can find a resistor chart and figure out the color code (L to R= white-gold-silver-black-red).
Thanks in advance!
Tom
Comment