CurtPalme.com Home Theater Forum

hal · Joined: 28 Nov 2012 Posts: 100

A few facts for all.

I have a 75KW transformer on my property, I also have line conditoners with 400 amp service.

The 20 amp circuit had the G90 and Mitsubishi plugged into it.

I went to power on the G90 and all that came on was the fans.. No 20 minutes warm up screen.

The Mitsubishi powered up with no issue.

I pulled the two fuses out and tested them with my Fluke meter and all is well.

There were two flashing error codes but I didn't pay attention to them 8X and 8X.. Because I turned the power switch off. I waited a minute and then turned it back on with no results... Nothing.. No error codes.. Dead..

It would have had to be a serious power surge to knock the G90 out and it would have taken out the Mitsubishi??

**Curt Palme** · Posted: Sat Mar 02, 2013 11:11 pm Post subject:

A few things back Smile

:

- line conditioners for the most part do nothing (IMHO). Everyone that's spent money on one (or more) think that they are the end all -be all to prevent anything electronic from failing. They don't.
-the G90 is 12-15 years old, so occasional failures will happen, which is what I suspect here.

It sounds like the LVPS has simply failed. THat's pretty common, next to the YA board, but a dead Dallas chip or issue on the YA board can also cause a dead set.

Turn the main power switch off, and on again. If the LED on the back doesn't flash 88 in red for a second, then it's going to be either the power supply or the Ya board most likely. THere's also a power PC board behind where the AC cord plugs into. That could also be at fault, but given that it appeared that part of the LV supply failed first, allowing the fans to come on but no picture, I'd suspect the YA board or the main LVPS. THere are actually two LVPS that should be tested. I can test and/or repair them if you want. Also, if the Dallas chip hasn't been changed, that's mandatory to prevent spot burn on the tubes down the road.

Email me at curtpalme at shaw.ca

Thanks!

hal · Joined: 28 Nov 2012 Posts: 100

Email sent!! If you are coming across the border I would hand the machine to you in Blaine plus the Pioneer SX9800.

CIR Engineering · Posted: Sat Mar 02, 2013 11:57 pm Post subject:

I just answered your email...

hal · Joined: 28 Nov 2012 Posts: 100

Craig, the lenses are still on the machine and the ground wires are attached. Waiting happily for the new lenses to show up (smile)

CIR Engineering · Posted: Sun Mar 03, 2013 7:12 am Post subject:

Oh god, shine a flashlight into your tubes and make sure they haven't been struck. Error 88 while running can shut down horizontal deflection without the protect realizing it (because the CPU is crashed).

If your tubes are not ruined, than I think you must have a bad power supply.

Also, never use the white warm up screen, so turn that off the next chance you get.

craigr

hal · Joined: 28 Nov 2012 Posts: 100

Craig, when turning the main power switch on nothing happens. I don't get the red LED, nor any flashing codes. The code indicators doesn't flash anything. Previous to this event, I haven't had any codes.

If I ruined the tubes, what am I looking for? I'll pull the lenses as soon as I can.

I must note, there was zero CRT illumination on power up. No flash, no nothing.. I have pulled the GA and GB boards.

Phoenixed · Joined: 13 Oct 2011 Posts: 514 Location: The mitten

No ABG lines either?

hal · Joined: 28 Nov 2012 Posts: 100

I looked into the tubes and seen nothing.

hal · Joined: 28 Nov 2012 Posts: 100

We have success...

Per Curt's recommendation I pulled my two LWPS. The boards looked really good. The caps weren't leaking. No burnt smell. This morning I was able to make a deal on a dead G90. The dreaded YA board has put this machine out of service at 7000 hours. I brought it home and swapped the two boards. The unit didn't power up. I then swapped the line voltage power supply board. The unit fired up..

**Curt Palme** · Posted: Mon Mar 04, 2013 2:02 pm Post subject:

Ya know, I think Craig said that there were only <1000 G90s made. Given the amount that we've seen here, the fact that Craig has over 50 customers with them, I've sold over 20 last year, and am well on the way to top that number this year, maybe there's more out there than we know of?

Just 'finding' a dead G90 3-4 years ago was a rarity.

And.. officially this is the first time that the AC input board died. THe one customer that I swapped that AC input board with actually had a wire break off at the main on/off switch on the back.

CIR Engineering · Posted: Mon Mar 04, 2013 4:13 pm Post subject:

CIR Engineering · Posted: Mon Mar 04, 2013 4:17 pm Post subject:

**Curt Palme** · Posted: Mon Mar 04, 2013 4:40 pm Post subject:

Yep, and considering in the last week alone, I've been offered 5 of them, all from people that have never contacted me before (yes, I made offers on all of them of course), there's still a messload of them in service. If I do get all 5 of them, or even a fraction thereof, the 2600 lumens on Cliff's screen may come in second to the 5200 lumens I may try in my place.

No idea where anyone would sit, but it could be fun..... Very Happy

hal · Joined: 28 Nov 2012 Posts: 100

Well, make it a first. The power supply board that has the input power cable and on/off switch failed.

kabuby77 · Joined: 28 Mar 2011 Posts: 147 Location: Italy

CIR Engineering · Posted: Tue Mar 05, 2013 3:39 pm Post subject:

I work in the USA, Europe, and Canada and I have never seen a serial number higher than 1000.

craigr