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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Wed Apr 20, 2011 4:12 pm Post subject: G90 LED window ???? |
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I have a G90, that is on the table, setting it up right now. Last night when I powered it up with the remote, the led window did not light up at all. the unit powers up and down and every thing looks normal, but no led window display. Is this a start of the Dallas chip problem or some thing different all together ?
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Wed Apr 20, 2011 5:55 pm Post subject: |
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Maybe a bad YB (LED board) or the driver on the YA for this daughter board. Def doesn't sound like anything to do with the infamous IC421 chip. Try reseating it first.
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Wed Apr 20, 2011 6:57 pm Post subject: |
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first time with sony pj, so just following wires from led to board and reseat it ? will try that tonite, and let you know what happens.
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Wed Apr 20, 2011 7:17 pm Post subject: |
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The socket for the YB is hardwired into the YA. It sits perpendicular to the latter. No wires to mess with.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Apr 20, 2011 7:35 pm Post subject: |
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You sure it doesn't light up when you first turn it on and then go out? That would be normal.
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Wed Apr 20, 2011 8:24 pm Post subject: |
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| macgyver655 wrote: | | You sure it doesn't light up when you first turn it on and then go out? That would be normal. |
Tru dat
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Wed Apr 20, 2011 9:04 pm Post subject: |
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last night when I used it,standing behind the pj, using the remote, the led light will not come on at all, the pj goes into the warm mode for 20 minute.
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Thu Apr 21, 2011 12:23 am Post subject: |
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Ok just power up the unit using the remote and the led window will not light up at all. I tried some thing else, power main switch off and then back on. the led did light up for a second and went off. If the remote is use to power the unit up, the led did not light up. Is this normal or should the led light up, when powering up with the remote too ?
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Thu Apr 21, 2011 12:41 am Post subject: |
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Doesn't make a lot of sense. What happens when you start from the integral control panel under the sliding cover?
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Thu Apr 21, 2011 1:13 am Post subject: |
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powering up with integral control.......no led light.......
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Thu Apr 21, 2011 2:06 am Post subject: |
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If you see a pic when a source is connected then don't sweat it.
Maybe someone can lend you another YB board with its LED and try to narrow the problem to that or the YA.
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Thu Apr 21, 2011 3:52 am Post subject: |
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Well I don't know , it works when switching the main power on and off, if it works then....can't be led board.....or am I jumping in the wrong direction.......
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Wed Apr 27, 2011 6:15 pm Post subject: |
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There is nothing wrong with your G90 as this is completely normal behavior... don't be paranoid like me 
You may get the display to light up momentarily when you change input scan rates, but if the projector locks on quickly it won't even light up than. Only time it usually lights is on hard power on or if something is broken.
If you get 88-88 on power hard up when you cycle the rocker switch for hard power on than your G90 is totally fine.
Happy now 
craigr
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shar1950
Joined: 10 Feb 2009
Posts: 80
Location: alberta, canada
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| Posted: Wed Apr 27, 2011 8:18 pm Post subject: |
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alot happier now......now how do I find out how old the pj is and if I should now replace the dallas chip ?
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Wed Apr 27, 2011 10:12 pm Post subject: |
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There's a build month/year on the info label (along with serial number) on the side near the base.
Point is though the youngest G90 is about 10 years old now so its good preventive maintenance to change out any original Dallas chips. If you spent a lot on a calibration you'll have a lot to lose if the data vaporizes.
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