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If your desktop computer is showing no signs of power, including no voltage when you measure it, here are some steps you can take to troubleshoot the issue:

1. Check the power source: Ensure that the power outlet you're using is functioning properly. Plug in another device to confirm that there is power coming from the outlet.
2. Inspect the power cable and connections: Make sure the power cable is securely connected to both the power outlet and the back of the computer. If you have a surge protector or power strip in use, verify that it's turned on and working correctly.
3. Reset the power supply unit (PSU): Some power supplies have a reset switch on them. Try flipping this switch to see if it resolves the issue.
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5. Test with a different power cable or outlet: If possible, try using a different power cable or plugging the computer into a different outlet to rule out any issues with the cable or outlet.
6. Check for signs of damage: Inspect the power cable for any fraying, cuts, or other damage. Similarly, examine the power supply unit inside the computer for any visible signs of damage, such as burns or bulging capacitors.
7. Try a different power supply unit: If you have access to another compatible power supply unit, try swapping it out with the one currently in your computer to see if that resolves the issue.
8. Remove unnecessary components: Disconnect any unnecessary peripherals or components from the computer, such as external drives or expansion cards, and then try powering it on again. Sometimes, a faulty peripheral can prevent the computer from powering on.
9. Test the power button: Ensure that the power button on the computer case is functioning properly. Sometimes, a faulty power button can prevent the computer from turning on.
10. Inspect internal components: If none of the above steps resolve the issue, there may be a problem with internal components such as the motherboard or CPU. In this case, it's best to seek assistance from a professional technician or contact the manufacturer for further support.

By systematically checking each of these potential causes, you should be able to identify and resolve the issue preventing your desktop computer from receiving power.

If your A20's screen suddenly turned black after dropping it, there are a few troubleshooting steps you can try:

1. Restart the device: Sometimes, a simple restart can fix many issues. Press and hold the power button until the device restarts.
2. Check for physical damage: Examine the phone for any visible signs of damage, especially to the screen. If you notice any cracks or damage, the screen may need to be replaced.
3. Test with another screen: If possible, connect your A20 to an external display using a compatible cable. This can help determine if the issue is with the screen itself or with the device's hardware.
4. Reset the device: If the screen is still black, you can try resetting the device to its factory settings. Keep in mind that this will erase all data on the phone, so be sure to back up any important information first.
5. Seek professional help: If none of the above steps resolve the issue, it's possible that the drop caused internal damage to the device. In this case, it's best to take the phone to a professional technician or contact Samsung's support for assistance.

Remember, if your phone is still under warranty, it may be eligible for repairs or replacement depending on the extent of the damage.

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I find the problem it is the Intel 277 controller, it is short. Capacitors around it are shorted.

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The printer is not picking the paper

I tried cleaning the roller etc. However the problem persisted.

The problem was solved after correctly positioning the green vertical tab in the back of the paper tray. The tab needs to be positioned at the correct location for the type of paper. Most of the time it is just 8x11 letter paper.

Hi Lenny

Can confirm that this worked perfectly for me and revived a very good printer that was set for being thrown away. Many thanks, great solution

the roller assembly has come apart cannot reassemble rollers for fax feed