Electronics > Repair
The early repair of Agilent 54810A
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GGMM:
Hello,

Well, now my Agilent 54810 is starting to work.
Power pb is set (Short circuit capacitor reminder on -12v on main acquisition board)
The keyboard works and I can enter the setup
The hard drive that seemed strange to me works (Loads a windows 95), I disconnected and put aside. Save to be do after.

I still have a problem with the backlight.

The SVGA board operates both an external monitor (ok) and an internal LCD monitor. (Nok)
If I look at the control signals of the backlight board, it is in OFF mode  (See picture)
Normally the backlight should work as soon as the power is turned on.
So something is blocking on the SVGA board. I wonder if there is not an info to check in the setup to activate the 2 modes?
I checked the fuse specs on this board everything is good.
The LCD screen must work immediately when power on (See example)
I did the test by removing the cable that is common to both cards, it’s the same.

And idea?
cdt

cdt
GGMM:
Hello,
After some investigations i found the documentation of the screen
to be see
I Have to verify my flat cable (cut?)
All fuses( VGA card and screen) e are OK

if anyone had this scenario
cdt
GGMM:
Hello,
Can someone put his advanced setup settings of the Atlas 757 motherboard of an Agilent 54810A, I do not understand that my LCD screen does not work. As if disabled(?)
Yet I apply to the letter the instructions of the manual service for the set-up.
There is something that seems limited to the SVGA screen.
Bizarre.
Thanks
GGMM:
hello,
I just did another test:
Only on the motherboard CPU  Atlas 757 and the video PCI card (66525).
The additional video module card (66502) is present, but not inserted into a PCI slot, and is only used to interface the power button with the acquisition board to the power.
The wire of the connector to the black light  pin 5 is diconnect from the VGA card  and grounded brings up the LCD screen
At this time the LCD screen works

So the chips 65550 on the video card don't seem to send the signal to ground to active the back light.
why???



coromonadalix:
normally this  card is seen as an external  video card, upon boot  it is supposed to set itself correctly unless i forget something

when windows boot   it is supposed to see the video card  lcd as the first  display / peripheral,  and thru windows  you are able to select the second vga / display port

and in windows  you need its related driver to be installed

have you seen this document
https://www.keysight.com/us/en/assets/9018-40076/service-manuals/9018-40076.pdf


you are supposed to leave it inserted in the pci slot,    while your translation is not perfectly good


take a full photo of the card and it's  hp  number(s) on it,  it is supposed to be this number
HP Agilent 54810-66502 or  54810-66503     

if  it is the right one,  does the battery is still good ?


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