I have I unit hp 2009f lcd and suddently no power, i diagnose the power board and all capacitor are ok, fuse also ok, and i have no idea where to diagnose next.
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1) Please post a picture of the main board as well.
2) On the connector from the power board to the main board, are there any DC voltages present on those colored cables? If yes, list them all with their color or pin number. At least one of them should be 5V DC.
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We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
1) Please post a picture of the main board as well.
2) On the connector from the power board to the main board, are there any DC voltages present on those colored cables? If yes, list them all with their color or pin number. At least one of them should be 5V DC.
Connector from the powerboard,
1. red - no dc power
2. red - no dc power
3. black
4. black
5. blue - no dc power
6. yellow - no dc power
7. green - no dc power
8. dark blue - no dc power
9. yellow - no dc power
10. green - no dc power
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We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
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2) What is the DC voltage at pin 8 using pin 4 as GND?
3) What is the DC voltage at pin 6 using pin 4 as GND?
4) What is the resistance of R852?
a) What markings are on that component?
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We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
My monitor also could not power ON 2 days ago. Yesterday, I managed to confirm Power Transistor A2764A1 abnormal. However, could not find datasheet for this part.
Hp 2009f LCD no power. Cause by sudden brownout, after it came back of power from main outlet. Theres no power at all of the LCD. Pls give me your answer. Tnx
Hp 2009f LCD no power. Cause by sudden brownout, after it came back of power from main outlet. Theres no power at all of the LCD. Pls give me your answer. Tnx
Sometimes these are as easy as replacing the main fuse on the power board.
With power off, check the main fuse with the ohm setting. It should have very low ohms if its good.
If the fuse is good you need to check for voltage at big filter cap. With power on ****Be careful*** you check for DC voltage on the 2 legs of that big main capacitor. I like to steady my elbows on the bench so the probes don't slip. It should have a very high voltage. 300+ volts DC.
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