dell optiplex 3050

[helmi h]

dell optiplex 3050no display 3 orange 6 white , Do you know what the problem is?

 

[Ahmad Safari]

You should search for these errors on the internet, but usually you will not get the right result.

Suppose you searched and did not find anything. First, replace the adapter and test with a suitable adapter.
Then disconnect the battery and test.
Now measure the voltage and see how much voltage there is.
The method is that you should first measure from the input jack, if it is on the jack, the output of the charging circuit, which is usually on the sense resistor, the voltage of the adapter should be usually 19 volts.
Next, the output of IC power is usually 3.3 V LDO, which is the power supply of SIO IC, should be produced, and in most boards, 3 and 5 voltages are also made, which you can check better in the table in the schematic.
The voltage on the switch button should be 3.3 volts and by pressing the switch button, its value will be zero and all the voltages will be present on the motherboard...

If you don't have these values at some stage, you should measure the resistance of the diodes of different parts, which are done in most of the videos and you can refer to the videos.