Agilent 34465a white screen no booting - Page 1
Forum section: electronics / repair

author: skskelwl
author_rank: Newbie
timestamp: August 30, 2023, 01:04:20 pm
content: Agilent 34465a white screen no bootingWarranty is gone so i have to fix it my selfThe problem is no booting in white screen. And few minuet later it repeats turn it on and off itself.What is the problem and how to fix it? Please help me

author: coromonadalix
author_rank: Super Contributor
timestamp: August 30, 2023, 03:04:01 pm
content: there's a few talk(s) about the 61 and 65 modelsDo some search please ... some talked about boot corruption / flash ... or having some spear 3 mcu going dead

author: TERRA Operative
author_rank: Super Contributor
timestamp: August 30, 2023, 04:08:18 pm
content: I can't help much except to say my 34461A had the white screen issue a while back, Keysight replaced the entire motherboard under warranty and I subsequently got the meter back with a new serial number.So, All I can offer is that it's an issue on the motherboard somewhere....Not much help....

author: skskelwl
author_rank: Newbie
timestamp: August 31, 2023, 03:51:06 am
content: I have to change the spear Mcu first…

author: jonpaul
author_rank: Super Contributor
timestamp: August 31, 2023, 04:11:17 am
content: had '65A new, afrer one day had totally black screen.Known issue in connectors or LCD.Suggest to open up, cehck all ribbon/flex cabls and connectors.Agilent/keysight service is the best but costly.Perhaps easier to sell on epay "for parts" and get a new one.The finest meter you can get!Jon

author: coromonadalix
author_rank: Super Contributor
timestamp: August 31, 2023, 06:31:58 am
content: no pun, but when it works

author: skskelwl
author_rank: Newbie
timestamp: August 31, 2023, 11:25:36 am
content: I found that spear320s-2 mcu is 110 degree Celsius. It is too hot like burned. I think it is the problem

author: TERRA Operative
author_rank: Super Contributor
timestamp: September 04, 2023, 03:13:15 pm
content: I found this service note that might help, maybe.....

author: Charos
author_rank: Newbie
timestamp: February 10, 2024, 01:10:18 am
content: I have the same failure, very hot MCU Spear320 (almost 150°C), I request local CZ Keysight service for new one (part No. 34465-66522) / repair

author: coromonadalix
author_rank: Super Contributor
timestamp: February 10, 2024, 02:48:09 am
content: some threads on the xxx61 xxx65 model where going into some supply line failures and may or could bust the spear mcu

author: testpoint1
author_rank: Frequent Contributor
timestamp: March 05, 2025, 08:23:11 pm
content: it is easy to replace the MCU chip "sparr320s-2", in the market, about 2-5 USD each one from China, all of them are used (if a person said that is brand new with higher price, that is a lie), just use it.

author: angdis
author_rank: Newbie
timestamp: April 23, 2025, 08:45:19 pm
content: Hey, got 34465A here at work that suffers from the "white screen" upon power-up, this happened more than a year ago and we had written it off.Weird thing is I powered it up a few days ago and it seemed totally OK-- everything worked, even passed self-test. I left it on overnight and the next day it was back to the white screen and it seems to stay that way.Is there any hope for this thing? I heard about memory issues but it seems to me that if that were the case it would never have been able to "resurrect" for a few hours, right?