Electronics > Repair

Agilent 34461A display failure......suggestions please!

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pasta2018:
check tps2051B pin 5,this is a over current protect, if there is an over current, pin 5 will be pulled to low logic.

autorepair78:

--- Quote from: 300DT on November 08, 2016, 03:19:56 am ---Thank you 6thimage!!!!!

What a lot of information to digest.......

As you stated,  "If it hasn't finished booting, then you won't be able to update the firmware via USB". I tried updating the meter using the Firmware Update Utility and did not get anywhere. No boot no pleasure!

Then I went for supper leaving the unit on. On my return an hour later,  I found, to my surprise, that the screen turned bright white in colour, and when I picked up the unit I burned my thumb on the "Spear" processor. This processor was hot to the point of burning my skin. It was NOT this hot before. Obviously it failed, by itself, just by being left running.

Consequently the screen now does not come up with the black and white "Agilent" notice and freeze, as it did before. Now, after cool-down, I get a bright white screen with no image displayed. I fear I need a new "Spear320-s".

This is my report for today. Thank you All for your help so far!

Mike VE3BNB

--- End quote ---

Hi
Did you change SPEAR320 and was ok? I'm asking because I have similar problem. My 34461A has only withe screen and very hot spears320

yuhar:
I just want to replace it, but the part has not yet arrived...

Same situation hot Spear320, white display.

autorepair78:
Where did you buy this procesor?

coromonadalix:
Some of them are still sold .... around 10-12 $ usd      But many are saying   end of life

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