If there is no power at all ie dead. Check continuity of the 3.15A, 250V Fuse on the power board. If it has replace (only costs like 40cents! Most likely it has blown.
I replaced one of the MBRF10100 diodes in isolated TO220 (D805 or D813), I couldn't find the original and used MBRF10H200. One of the two internal diodes was defect (short).
Try and replace the three Elite 16V 1000µF caps, especially if they are swollen.
Worked for a "Power on-then off" monitor of a friend of mine recently. Case easy to open, gotta find hidden screws to drop base. Let me know if it worked
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Unplug all power cables and check for bad connections. Reconnect all cables. Does the power supply fan rotate? Yes or No? Looking through the vented left side of the tower with the power cable plugged in do you see an LED lit? If no fan spinning in the power supply and no LED lit, then I suggest you change the power supply. Either do it yourself (very easy to do or have a tech shop do it for you - it's cheaper to do it yourself).
1. Un-plug all power cables.
2. Unscrew side panels.
3. Count how many of each type of power cable is required for on board devices.
4. Calculate power requirements by watts.
5. Purchase new power supply that has the cables you require and the required wattage to support your devices.
6. Unplug all power cables inside.
7. Plug in new power supply.
8. Plug in power cable first before turning on the computer. The green LED on the motherboard should come on. Congrats you have power.
9. Turn on the computer.
10. Enjoy!
this problem occurs when power or VGA malfunctioning. remove the VGA clean the slot a put it again. if the problem remained, remove the RAM and put it in another slot. this may work.
Success story. Disclaimer I haven't notice any damage or loss of data, However I take no responsibility for any damage or loss of data that may occur.
My girlfriend has a xperia T and did let it go flat, since then it didn't appear to charge or switched on.
I had tried allsorts suggested on various websites such as plugging charger in and out a few times, leaving in charger for 24 hr, plugging into laptop, and trying to power up with power button and volume up. Red light sometimes lighting up or flashing but not staying lit.
After playing around with all of the above methods, I noticed if I kept my finger on power while plugging into the charger or laptop the red led stayed on until I let go. So I tied an elastic band around the phone on the power button, then I plugged in the charger, unplugging it, plugging in again with volume up pressed until I had the red led lit. Not sure of which combination I did but just when the led was lit (not flashing). I left it for a few hours while it was plugged in with the elastic band keeping pressure on the power button. Came back to it and found the phone on and battery at 100%.
Plug the printer straight to the wall power outlet, bypass any surge device or power strips. If still no power. Unplug the power adapter from the printer. The power adapter is the black box behind the printer where the power cord is attached. With the power cord still attached to the power adapter and the other end plugged in to the wall power outlet, the LED, found around the silver contacts on the adapter, should lit green. If it's not lit, make sure the power cord is properly secured in it. Otherwise, you're looking at a defective power adapter. If that's the case, I suggest you contact Lexmark Technical Support and request for a new power adapter for your printer. They can send you one for free. If it's lit, plug it back in the printer in the right position. If it won't automatically power on, press the Power button. If that doesn't help, the problem might be on the printer itself. Again, if that's the case, I suggest you contact Lexmark Technical Support. Hope this helps.
The light should be lit on the power supply when its plugged into the wall. Sounds to me like the power supply might be bad. Plug it into another working outlet and if it still doesn't light up then the power supply is bad.
The monitor was probably fried during the power outage due to a spike just before the power went out. On the power brick check to see if there is an LED light and see if that is lit when its plugged in. If its not lit up then you may want to try a new power brick, if it is lit up then your monitor is a dead.
Power supply has several voltages. Just because the 5v power is active doesn't mean all the voltages are OK. You need to have the power supply tested for 12v and 3.3v. A quick test is to unplug all the wires from the power supply. There is a single green wire on the motherboard main plug. Connect (use a bent paper clip) that green switch wire and any black wire. Plug in the power supply and it should run (fan starts)
i had the same problem with my technosonic, power leads lit up but no power to monitor. was about to throw it away when i realised my laptop lead would fit monitor, so as one last ditch attempt i plugged it in and lo and behold the monitor came on. so the problem was the power lead, even though it lit up and appeared to be working,not the monitor.
same problem; it acts as if a fuse is blown; but no fuse. The caps sound likely UGH. Any other thoughts?
Bill
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