Dell Inspiron 1545 arrives with No Power, No Lights and short Power Supply.This unit arrived with because the customer thought it was a DC Jack repair because it was shorting out the power supply everytime it was plugged in. So it did not matter which power supply was used it would still short out.
My way was to simply separate the power panel board from the laptop and see if it was the laptop having a short or the small power board. When the small board was removed, the power supply would still short out. Looking into the jack itself, and testing from POS to NEG shows no short on meter. So tracing the path from the POS terminal on the back through the on board diode showed continuity. 
Reversing the meter's leads it shows 1 Ohm. So this tells me that the diode was shorting the unit.
Extracting the power board only took 3 screws, and not having to remove the whole motherboard made things simpler and a quick repair. Then lifting the power board and replacing the diode.
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| Boots after replacing diode |
After power board diode was replaced. To test, I simply plugged in the power supply before putting it back into the base. This would show me if the power supply was still shorting. It did not short again, so I re-installed the power board and turned on the unit. It works!
Starting the OS everything appears to be OK, except for the message that Windows did not shut down correctly the last time. This was to be expected, but everything works fine now.
9 comments:
hi mayo i have an HP hdx16 that dont boot a all only the hdd light keeps blinking red and the caps and num lock blink 1 time the model is hp pavillion hdx6t do u any thing about this error?? ....
thank you
Hey Mayo, nice to see your blogging again,any news on the project for Hollywood stardom starring A.Dell.
Chow, Mike
Mohamad: You may want to check out the SATA ports or test with another drive. I have not had my hands on a HDX6T yet so I have no clue on the insides or architecture of the unit.
Michael: It's been hectic around here. Repairing for several shops as well as creating the video, training others and travel needed in the recent months. Can't wait till this summer when I can start to relax. BTW: Hollywood is not my goal, I've lived there and would not like to go back!
Ciao
Hi,
I have the same exact situation with my motherinlaw's Dell 1525. Color me stupid but...where does one obtain a power board diode?
Hello,
I have the same problem with the power board and have spent many hours looking for the diode, by part number but have failed to find it, Your review is great and very helpful,
Darren
Hi mayo! i used my dell inspiron 1545 laptop without using its battery, it is directed to the charger, and then the problem occur, it did not power on anymore the time i power it on but i can charge the battery, can u please tell me the possible problem? is it the diode?
Hi mayo! i used my dell inspiron 1545 laptop without using its battery, it is directed to the charger, and then the problem occur, it did not power on anymore the time i power it on but i can charge the battery, can u please tell me the possible problem? is it the diode?
Hi mayo! i used my dell inspiron 1545 laptop without using its battery, it is directed to the charger, and then the problem occur, it did not power on anymore the time i power it on but i can charge the battery, can u please tell me the possible problem? is it the diode?
BertJohn: Your post was nested as an reply 3x.
No, I don't believe it would not be the diode (unless it is open). Since you had used your laptop with the adapter and those octagonal jacks are not as durable I would say that it is a DC Jack issue. Most likely the NEG terminals are not making good contact. Least expensive method is to replace Jack (~$5) then board if not capable of troubleshooting.
As stated previously- the parts numbering system has been 'Babelized' by the Chinese manufacturers, so now searching for parts by markings is a big waste of time. It is easier to get the part from another board.
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