My HP Elitebook 1030 G3 will not turn on unless I disconnect the battery and reconnect it (and press the power on button). After shutting down, I have to disconnect the battery and reconnect it again to start up via the power button.
I went to the BIOS and enabled turn on when lid opens. So everytime I want to turn on the laptop, I just open the lid.
So what are the settings that I need to change to enable the power button?...
Just to update everyone, I downloaded the Roland JV-90 service manual which had the schematics. I did the following
1. I measured the XRES voltage at the power board and at all the ICs (that receives the XRES voltages) on the mainboard
2. I measured the 5V at the power board and at all the ICs on the mainboard
3. I also checked the capacitors to ground at all the XRES and 5V above (to check that they are not shorted)
After doing the above, the JV-90 worked perfectly. I also left it on for about 6 hours and there...
When I switch it on from cold it works perfectly. However, after a few minutes it starts to act strangely. The LCD screen shows garbage, the LED lights starts to blink randomly and the sound that comes out are intermittent.
I notice that the main IC (Roland R15239229) gets hot (more than 50 degrees C).
What could be the problem?
Why does it go crazy only after the circuit warms up? Could it be due to a blown capacitor, resistor or IC?
The TV wont turn on and when power is plugged in, the LED will turn from Green to Red and then one Green blink before repeating (Green to Red and one Green blink).
Any pointers is much appreciated.
I also need help to identify which pin is the standby voltage. I only get the 5V for the 2 pins in the attached picture....
Thanks. But the strange thing is that there is no short when I check the resistance at the VCore inductors (about 0.5 Ohms) and I do get about 0.7v at the VCore when I power up the card. Just no voltage at the Vmem inductor....
The voltage of my Palit GTX 1070 Ti's Vmem is 0V. The rest of the voltage rails (including Vcore) is present.
The resistance of Vmem to ground measured at the inductor is only about 6 ohms. When I injected about 1.2V at Vmem, the core heats up to just below 40C.
I have 2 LG 60PA6500 Plasma TVs. One of them recently wont power on (wont even go into standby mode) and I managed to zero down the problem to the mainboard.
I checked the standby voltage going into the mainboard reads at 3.47v for both the good and the bad mainboards.
The Vin on IC600 for both boards read 3.47v. However, I note that the Vout on IC600 for the good mainboard reads 3.32v, but on the bad mainboard it reads 0.3v. I have attached a picture of one of the boards.
Would the problem on the bad mainboard be purely due to IC600 or can other defective...
Re: bad ceramic capacitors on Y-Sustain board of LG50PA6500
I had a similar problem on my LG 60PA6500, whereby I had a dead Y-Sus Board. Upon power on, there would be a humming noise coming from the Y-Sus Board before the TV shuts down.
Upon checking, I found several bad MOSFETs (under the two large heat sinks), two dead resistors and two dead diodes. After replacing them, I got the TV up and running again.
I did test the electrolytic capacitors and did not find any defective ones.
I would suggest that you remove the mosfets, resistors...
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