* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
-
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
-
* An intermittent power light ''might'' indicate a loose [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only) or perhaps a broken centre pin in the jack.
+
An intermittent power light ''might'' indicate a loose [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only) or perhaps a broken centre pin in the jack.
+
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
To check this out, disconnect the power to the PC and then [link|https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and its output on the board and also the -ve outer ring connector as well.
If the jack is faulty it has to be replaced as it cannot be repaired
If the jack is OK then there's a motherboard problem
* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
* An intermittent power light ''might'' indicate a loose [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only) or perhaps a broken centre pin in the jack.
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
To check this out, disconnect the power to the PC and then [link|https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and its output on the board and also the -ve outer ring connector as well.
+
If the jack is faulty it has to be replaced as it cannot be repaired
+
If the jack is OK then there's a motherboard problem
* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
-
* An intermittent power light ''might'' indicate a loose or broken centre pin in the [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only).
+
* An intermittent power light ''might'' indicate a loose [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only) or perhaps a broken centre pin in the jack.
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
To check this out, disconnect the power to the PC and then [link|https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and its output on the board and also the -ve outer ring connector as well.
If the jack is OK then there's a motherboard problem
* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
* An intermittent power light ''might'' indicate a loose or broken centre pin in the [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only).
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
To check this out, disconnect the power to the PC and then [link|https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and its output on the board and also the -ve outer ring connector as well.
+
+
If the jack is OK then there's a motherboard problem
* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
-
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
-
* An intermittent power light ''might'' indicate a loose or broken centre pin in the [https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only).
-
+
* An intermittent power light ''might'' indicate a loose or broken centre pin in the [link|https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only).
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
-
To check this out, disconnect the power to the PC and then [https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
+
To check this out, disconnect the power to the PC and then [link|https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
-
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and output on the board and also the -ve outer ring connector as well.
+
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and its output on the board and also the -ve outer ring connector as well.
Hi @satyroth
Two things to try:
* Disconnect the power to the PC and then press and hold the PC's power on button for a full 30 seconds and then release it. Reconnect the power and check if it turns on.
If still no good, disconnect the power to the PC and then disassemble it (see link below) to gain access to the motherboard. Remove the coin cell RTC battery from the board, then press and hold the PC's power on button for a full 30 seconds and then release it. Reinsert the RTC battery (remember the orientation, usually it is +ve on top as marked on the battery), reassemble the PC, reconnect the power and check if it turns on. Whilst the battery is out check its voltage. If it <2.5V DC replace it. The battery type is on the battery (CR2032 perhaps)
* An intermittent power light ''might'' indicate a loose or broken centre pin in the [https://www.ebay.com/itm/275395443197|DC-In jack] (supplier example only).
What can happen is that the centre +ve pin of the jack breaks internally and this opens the power supply path from the adapter to the motherboard. Therefore the motherboard won't turn on when the power is connected.
To check this out, disconnect the power to the PC and then [https://www.youtube.com/watch?v=TvCuRqt4bdE|disassemble] it enough to gain access to the jack.
Once there check that it is not loose on the board and also use an Ohmmeter to prove continuity between the jack's +ve centre pin input and output on the board and also the -ve outer ring connector as well.