Dead LA-H323P (no light) - HP 15-DW
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by Rav_tangleHi all , thanks for having me & I think this has been asked before but my case seems a bit odd.
I have a MacBook Pro , board 820-2915a and it turns on , chimes etc etc , keyboard lights up, fans spins , can turn caps lock on/off but screen is dead.
Iv tried the resets , shine torch through back logo , nothing , it seems the screen has no power. If I plug charger , it charges but if I disconnect battery it displays green light but won't turn on. Iv tried screen on with another board & it works & seems I'm not getting any voltage at pin 2 , next to ground pin .
is this... -
by mecha1166I have a XR-77A80K here. When plug in & press power, white lindicator light flashes on & off. about 30 seconds later, indicator light flashes 8x red. Checked Sony, Power reset = unplug & plug in. Factory reset involves turning it on, then pressing remote buttons when a picture shows. Well, neither of these "resets" are for a dead set like this. Anyone know what 8 blinks indicates, from the schematic? Thanks!
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by sam_sam_samSee pictures for type of laptop computer
I checked switching power supply brick 19.2 volts multi meter only
No booting without switching power supply connected
Checked switching power supply with an (28 volt ) incandescent light bulb it lights then hooked up the switching power supply again now the laptop and boots like normal
What the heck is going on here...-
Channel: General Computer & Tech Discussion
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by mecha1166I am working on a QN750Q8FNBFXZA. Dead except the standby light. It blinks what appears to be 1 3 1 2. 1 long blink, pause, 3 short, pause, 1 long, pause, 2 short, pause, repeat. A service manual would be very helpful, or if anyone knows these error codes. Thanks!
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by EffiSonHi,
Got a QNAP TS 653D today, which is totally dead.
After some investigation found that one of the dc-dc IC (buck converter 568215/ TPS568215) is getting too hot (with NAS own PS).
Switch to bench power supply and applied the 12V supply to identify the short circuit where found that the unit continuously draws draws 110mA !!!
Does anyone has its schematic or boardview ?
Question is how can i verify if that is the only IC which is defective ? is there any way to bypass that and verify the HW before got replacement IC ? where else can i get the similar...-
Channel: Troubleshooting & Designing Networks
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