My beloved 2007WFP just died on me. It has a green blinking light that just cycles through various display numbers. For a while I noticed it would blink slightly like the refresh rate was off. Nothing I have done has been successful in turning it on. So I took it apart and looked at the USB board since many people have had problems with the resistors under the silicon blob. I looked at the various other boards for the obvious signs such as blown caps, bad fuses, burn marks etc. Nothing looked obvious. I also checked most of the caps with an ESR meter and they checked out good.
From my understanding 01c resistors should be 10K ohms, 153 should be 15K ohms, 473 should be 47K ohms, 753 should be 75K ohms, 272 should be 2.7K ohms
What I found was that some reading under the silicon were good and some were off. The 272 resistor that most people were having problems with was good. I don't know what the caps should read.
Below are the readings I found from top to bottom.
capacitor 3.6M ohms
01c 6.53M ohms==>bad
01c 5.2K ohms==>bad
capacitor 7.34M ohms
153 15K ohms OK
473 30K ohms==>bad
capacitor 30K ohms
753 30K ohms==>bad
272 2.7K ohms OK
Could most of these resistors be bad? Also what size are these resistors?
Please let me know what you guys think.
I have attached pic for reference.
Joe
From my understanding 01c resistors should be 10K ohms, 153 should be 15K ohms, 473 should be 47K ohms, 753 should be 75K ohms, 272 should be 2.7K ohms
What I found was that some reading under the silicon were good and some were off. The 272 resistor that most people were having problems with was good. I don't know what the caps should read.
Below are the readings I found from top to bottom.
capacitor 3.6M ohms
01c 6.53M ohms==>bad
01c 5.2K ohms==>bad
capacitor 7.34M ohms
153 15K ohms OK
473 30K ohms==>bad
capacitor 30K ohms
753 30K ohms==>bad
272 2.7K ohms OK
Could most of these resistors be bad? Also what size are these resistors?
Please let me know what you guys think.
I have attached pic for reference.
Joe
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