Re: Kenwood DNX570HD No boot Red Triangle Lit - Characteristic Fault?

I tried the dealer firmware reload but so far I can't initiate the upload. The instruction in the .pdf at Step 4 is ambiguous: it says connect the USB memory device to the USB terminal, not to the I-pod terminal then turn ON. The only USB on the DNX-570HD is the one on the extension cord, the only I-pod connection is by Bluetooth, I believe. (I don't have an I-pod.) I can't turn the unit ON, when I connect 13 VDC to the Main and Backup terminals, the red triangle illuminates, the fan starts and both stop after...

I'm hoping to find the answer to a no boot, red triangle illuminates fault in a Kenwood DNX570HD. I have two of these double-DIN head units and they both have the same failure mode, which makes me think it may be a characteristic fault, but so far I haven't been able to unearth any intel on this.
The symptomology for both is: when power applied to red/yellow leads, the red triangle illuminates for about 40 seconds and the fan starts. After this time passes, fan stops and the triangle goes dark. Pressing the red triangle reset causes the same sequence to repeat.
I have the service...

Re: LG Z50PT320 (PU14K) Plasma no brightness

Since then I have replaced R2, R16 and R17 on the Z-sus board, they were all open. Made no difference in the symptoms, Z-sus heat sinks remain cold. Also I've yet to find a download of MStar v4.1.8 so I can communicate with the SysCon.

Re: Vizio sv420m black screen

I sure sounds like soldering, plug/cable or other intermittent connection issues were the trouble here.

Friends,

I am an audio technician, fixing mostly large amplifiers from QSC, Crown Audio, Samson, etc. who needs to repair a Zenith/LG plasma which we installed.

It has no brightness and apprently no audio, tho' it might if it were on a source with audio supplied. It turns on, the red LED blinks several times, the Y-sus board makes a normal sound. Va=55 VDC, Vs=205, +5 is OK, +3.3 is OK but +15 = 18.3 VDC. Power consumption is low, jumping between 50 and 90 watts. The system control is active, it will switch between various source and if left on it shuts down due to...