加电后底板上的电源指示灯，亮一下灭了，无法加电。 先看是否机箱内有螺丝等异物，导致短路。其次察看有关电源线是否接反，导致对地短路。再次利用替换法，更换电源，看是否电源的问题，更换地板看是否地板的问题。 6、工控机加电后，电源工作正常，主板没有任何反映。 先去掉的插卡及所连的设备，看能否启动。如果不能，可去掉内存，看是否报警。然后检查CPU的工作，是否正常。替换主板，检查主板是否正常。 7、开机机器没有启动，能听到连续的报警声。 根据报警声，能确定是内存的问题。打开机器看内存是否接触好，或更换内存插槽进行测试。更换内存看是否内存的问题HP 54720D Oscilloscope + 54713B 54712A 54721A Amplifier
HP 54825A Infinium Oscilloscope 500MHz 2 GSa/s FOR REPAIR ONLY
HP 5528A Laser Measurement System Linear-measurement resolution 0.01um
HP 6010A DC Power Supply 0-200V/0-17A 1000W
HP 6030A SYSTEM AUTORANGING DC POWER SUPPLY 0-200 V / 0-17 A, 1000 W
HP 6032A Power Supply 60V, 50Amp, Calibrated with 30   
HP 6032A SYSTEM POWER SUPPLY 0-60 VOLT 0-50 AMP 1000 WATT HEWLETT PACKARD
HP 6035A 0-500V/0-5A/1050W DC Power Supply with GPIB
HP 6050A Mainframe w/ 2x 60503B 250W Load
HP 6624A power supply, NIST-certified, guaranteed
HP 6628A DC power supply, NIST-calibrated
HP 6628A Precision System Power Supply
HP 6673A 2000 Watt System Power Supply, 35V, 60A
HP 6675A DC Power supply   with NO RESERVE 
HP 6684A/V60 0-40 V, 80 A 5kW DC Power Supply
HP 675A Sweeping Signal Generator
HP 70000 SPECTRUM ANALYZER 70905A OSCILLATOR LOADED
HP 70001A + 70912A + 70700A + 70902A + 70900B + 70904A Mainframe + More rack17b
HP 70001A w/ HP 70612B Switch Module, HP 70310A Freq.
HP 70004A COLOR MAINFRAME DISPLAY 70902A 70903A 70621A 70310A PLUG IN MODULES
HP 70004A display spectrum analyzer with 70900A 70902A 70904A plug in modules
HP 70004A Display w/ HP 70612B-K43 Module, HP 70100A
HP 70004A Display, 70900B Oscillator, 70902A, 70903A
HP 70004A Spectrum Analyzer 70902A 70903A IF Section +70900B Oscillator
HP 70311A /70841B/70842B 3GHz Pattern Generator & Error Detector System
HP 70330A 300 MHz Pulse Generator
HP 70332A 100 MHz Multiple Clock Generator
HP 70340A SIGNAL GENERATOR 1-20GHz
HP 70621A Preamplifier ( 100 kHz - 2.9 GHz )
HP 70820A Microwave Transition Analyzer Range DC-40GHz
HP 70842B ERROR DETECTOR
HP 70843A 0.1-12 Gbit/s Error Performance Analyser w/Opt.UHF (2013 Sale )
HP 70908A RF Section 100 Hz to 22 GHz Plug-In
HP 70909A RF Section 100 Hz to 26.5 GHz Plug-In
HP 71210A 100Hz- 22GHz Spectrum Analyzer
HP 71603B 3 Gigabyte Error Performance Analyzer from Naptech Test Equipment
HP 71612B Error Performance Analyser 0.1 - 12 Gbit/s
HP 71612C Error Performance Analyser 0.1 - 12.5 Gb/s
HP 7418A Chart Recorder Rack Mount Enclosure
HP 75000 Agilent E1401B VXI Mainframe + E1406A E1683A
HP 75000 E1401A w Cards Sonet/SDA E1663A, E1420B E1671A
HP 75000 Series B - Stacked With Modules  See Description.
HP 75000 SERIES C E1740A TIME INTERVAL ANALYZER CARD
HP 75000C E1401A RADI-EPC7 E1411B E1351-66201 Z2417 +MO
HP 81104A - 80 Mhz Pattern/Function/Signal Generator (x2) 81105A Modules fitted
HP 8118A Programmable Pulse / Pattern Generator
HP 81200 667MHz 2ch Data Generator E4801A+E4831A+E4843 2
HP 8130A pulse generator with option 020 ( 2 channels ) , NIST-calibrated
HP 8130A pulse generator, NIST-calibrated
HP 8133A 3 GHz Pulse Generator Opt 002
HP 8133A 3 GHz Pulse Generator Opt 002   Calibrated  
HP 8147 optical time domain reflectometer E4310A E4324A
HP 8150C 45MHz-26.5GHz Vector Network Analyzer, 8515A, 83631B, Complete Set
HP 81520A HIGH POWER OPTICAL HEAD
HP 81524A optical head 800 - 1650nm
HP 8153A Lightwave Multimeter Mainframe Option 81536A Power Sensor  Powers ON 
HP 8153A with 81533B Interface and 81521A with Barefiber Adapter 81000BA
HP 8156A optical attenuator Option 100
HP 8156A optical attenuator Option 101 ( or opt 100, 121, 221, 350)
HP 8156A optical attenuator Option 350
HP 8156A Option 350 Optical Attnuator / 50/125 um Multimode  SELF TEST PASSED 
HP 8160A/001/020 programmable pulse generator, NIST-calibrated
HP 8161A programmable pulse generator w/ options 020 (outputs A & B) NIST-cal'd
HP 8161A Programmable Pulse Generator w/opt.020
HP 81689A Tunable Laser module.w opt 072
HP 8168A Tunable Laser Source
HP 8168F / 022 Tunable Laser source
HP 8168F Tuning Laser Source Calibrated 1-23-2012 Optical Communications Opt.022
HP 82000 E1216A E1216-66504 E121666504 PMU Board
HP 8328A Tranmission Line Test w/ 8757A, 83592A, Printer & Case
HP 8340A 10 MHz to 26.5 GHz Synthesized Sweep Generator w/ opts 005,006,007
HP 8341A / 004 / 006 / 007 Sweep Generator, 0.01 MHz - 20 GHz
HP 8341B 20 GHz Synthesized Sweep Generator w/opt.004 (Fall Clearance )
HP 83430A LIGHTWAVE TRANSMITTER
HP 83437A Broadband Light Source
HP 83438A High-Power Erbium ASE Source
HP 83481A Optical/Electrical Module Option 040
HP 83485B 30 GHZ OPTICALPLUG-IN Band
HP 83485B Opt. 040 Optical Plug-In Module
HP 83487A Optical/Electrical Plug-In Module
HP 83487A Plug-In Module w/OPT 041, 1063/1250Mb/s, 750-860nm 
HP 8349A Microwave Amplifier, 2-20 Ghz
HP 8350A/83522A Sweeper
HP 8350B Sweep Oscillator with HP 83595A RF Plug-In .01-26.5Ghz
HP 83555A mm - Wave Source Module 33.0-50.0 GHz
HP 83592A 10 MHz to 20 GHz Sweeper Plug-In
HP 83592A Broadband RF Plug-In -   4 with various options Parts Only, As Is
HP 83592A Sweeper Plug-In, 10MHz-20GHz
HP 83595A 10 MHz to 26.5 GHz Sweeper Plug-In
HP 83595A Broadband RF Plug-In - .01-26.5 GHz - For Parts, not  
HP 83620A Synthesized Sweep Generator
HP 83621A Synthesized Source 45 MHz to 20 GHz, for 8510 Series Network Analyzer
HP 83623A 8360 SERIES SYNTHESIZED SWEEPER    OPT. 001,002,006,008   
HP 83630A 8360 Series Synthesized Sweeper Opts. 001,004,008
HP 83630L SWEPT GENERATOR    001   
HP 83640L 8360L SERIES SWEPT CW GENERATOR
HP 83650B 50GHz Synthesized Sweep Signal Generator w/options 001/008
HP 83711B 1-20GHz Synthesized CW Generator Calibrated
HP 83731B microwave signal generator, 1-20 GHz
HP 83731B Synthesized Signal Generator, OPTS. 1e1 & 1e5
HP 8487A Power Sensor - 50 MHz to 50 GHz, -30 to +20 dBm, 2.4mm(m) connector
HP 84907K 70dB ATTENUATOR
HP 8494B, 8496B, 11716A set 0-18 GHz steps Attenuator OP 001 Type N female
HP 85025D
HP 85029 85029A Attenuators/Verification Kit- Rack 13 
HP 85036B 75 Ohm calibration kit
HP 85047A 6 GHz S-Parameter w/ (1) 08503-60051/ (4) 8120-4782 (Fall Clearance )
HP 8504B PRECISION REFLECTOMETER
HP 85051-60005 10cm Airline replaced by 85051-60010
HP 85051-60006 10cm Beatty Standard replaced by 60011
HP 85070A Dielectric Probe Kit
HP 8508A 85081B 100kHz-1GHz 2ch Vector Voltmeter
HP 8508A Vector Voltmeter
HP 8508A Vector Voltmeter with 85081 Input Module PLUS probes - Very Nice Cond.
HP 8508A Vector Voltmeter with HP 85081B
HP 8510A in   condition
HP 8510C 8515A 8341B 20GHz Precision VNA Vector Network Analyzer
HP 8510C NETWORK ANALYZER    OPT. 010   
HP 8510C NETWORK ANALYZER 8514B S-PARAMETER TEST SET 83621A SYNTHESIZED SWEEPER
HP 8510C Network Analyzer w OPT 008 & Display Processor
HP 8510C NETWORK ANALYZER w/8515A S-PARAMETER TEST SET
HP 8510C NETWORK ANALYZER w/8515A S-PARAMETER TEST SET 26.5 GHz TESTED GOOD
HP 8510C Vector Network Analyzer, 45MHz-18GHz 8514A Test Set
HP 8510C w/opt 010 Network Analyzer System (Fall Clearance )
HP 8510C/010 Vector Network Analyzer 45 MHz to 110 GHz
HP 8514B S-Parameter Test Set 45 MHz to 20 GHz (2013 SALE )
HP 8515A S-PARAMETER TEST SET 45MHz-26.5GHz
HP 8515A S-Parameter Test Set 45MHz-26.5GHz
HP 8516A 45 MHz to 40 GHz S-Parameter Test Set (Fall Clearance )
HP 8516A S-Parameter Test Set 45 MHz to 40 GHz
HP 85320A 2 - 26.5 GHz Test Mixer Module
HP 8560A 50 Hz to 2.9 GHz High Performance Spectrum Analyzer (105 Hours of use )
HP 8560E 30Hz-2.9GHz Spectrum Analyzer + 85620A Module Rack16b
HP 8560E Spectrum Analyzer 30 Hz to 2.9 GHz
HP 8561A 1kHz-6.5GHz Spectrum Analyzer rack17b
HP 8561E SPECTRUM ANALYZER
HP 8561E SPECTRUM ANALYZER    SOLD AS IS   
HP 8561E Spectrum Analyzer 30 Hz to 6.5 GHz (Fall Clearance )
HP 8563E 9 KHz to 26.5 GHz Spectrum Analyzer
HP 8563E 9kHz-26.5 GHz Spectrum Analyzer Opt 104 Calibrated
HP 8563E microwave spectrum analyzer 9kHz - 26.5 GHz
HP 8563E SPECTRUM ANALYZER
HP 8563E Spectrum Analyzer w/opt's 006,026 / 85620A NIST Cal (Fall Clearance )
HP 8563EC 9 KHz to 26.5 GHz Spectrum Analyzer w/ op 007
HP 85640A RF Tracking Generator 300 KHz-2.9 GHz
HP 85640A Tracking Generator 300khz-2.9Ghz -Calibrated
HP 8564E
HP 8564E Spectrum Analyzer
HP 8564E SPECTRUM ANALYZER
HP 8565E /006 30Hz-50GHz Spectrum Analyzer
HP 8565E 9 KHz - 50 GHz Spectrum Analyzer w/ option 7
HP 8565E SPECTRUM ANALYZER 9KHz-50GHz OPTION 007 WITH 85620A MEMORY MODULE
HP 8565E SPECTRUM ANALYZER 9KHz-50GHz OPTION 007 WITH 85620A MEMORY MODULE Clean
HP 8566A Spectrum Analyzer System Calibrated (2013 SALE )
HP 8566AB In Cal  Tested 
HP 8566B 100 Hz to 22 GHz Spectrum Analyzer w/Cables (Fall Clearance )
HP 8566B Spectrum Analyzer 100 Hz to 22 GHz NICE.. Sharp Display   
HP 8566B Spectrum Analyzer 100MHz - 22 GHz
HP 8566B spectrum analyzer with   display
HP 8567A 10KHz-1.5GHz Spectrum Analyzer
HP 85685A RF Preselector 20Hz-2GHz "Parts"- 8104A 
HP 8568B
HP 8568B SPECTRUM ANALYZER 100 Hz.-1.5 GHz W/DISPLAY #2
HP 8568B SPECTRUM ANALYZER 100 Hz.-1.5 GHz WITH DISPLAY
HP 8568B-001
HP 8569B SPECTRUM ANALYSER 10 MHZ-22GHZ
HP 8590A SPECTRUM ANALYZER
HP 8590A Spectrum Analyzer, 10kHZ-1.5gHZ, OPTION 021, has Carrier Handle
HP 8590D 1.8 GHz RF Spectrum Analyzer w/opt.001
HP 8591A-021-103 with Calibration & 60   
HP 8591C Cable TV Analyzer Opt 004/101/102/105/107/001/011/043/ABU Calibrated
HP 8594E 9 kHz - 2.9 GHz, Options 041, 101, 105 Spectrum Analyzer
HP 8594E Spectrum Analyzer 9kHz-2.9GHz + options rack17b
HP 8594E Spectrum Analyzer options 004,041,101,105,J62,J63 and J66
HP 8594E/004/010/041 Spectrum Analyzer + TRACKING GEN., 9 kHz to 2.9 GHz
HP 8594E/021/101/105 Spectrum Analyzer - 9 kHz to 2.9 GHz
HP 8595E 9kHz-6.5GHz Spectrum Analyzer Options 004/041/105/151/163/J63
HP 8595E Spectrum Analyzer 6.5 Ghz with Opt 41
HP 8595E Spectrum Analyzer, Different options, carry handle and rack mounted
HP 86062C Lightwave Optical Switch
HP 86290A Plug In
HP 86290B Plug In
HP 86290C Plug In
HP 8642A synthesized signal generator, NIST-certified
HP 8642B Signal Generator 0.1-2100 MHz- 8104C 
HP 8643A Signal Generator (Reduced 8/12)
HP 8643A Signal Generator Opt. H02 (Reduced 8/12)
HP 8643A synthesized signal generator, NIST-certified
HP 8643A synthesized signal generator, with options HO2 and KO1, NIST-calibrated
HP 8644A Synthesized Signal Generator
HP 8644A Synthesized Signal Generator 0.26-1030MHz + Operating & Calib Manual
HP 8644B High-Performance Signal Generator w/ Opts.001/005 (2013 Sale )
HP 8644B signal generator
HP 8644B Synthesized Signal Generator Opts 001, 002
HP 8648A 100 kHz to 1 GHz, Signal Generator
HP 8648B 100 KHz to 2 GHz Signal Generator w/Opt.1E5 (Fall Clearance )
HP 8648B Signal Generator 100kHz - 2 GHz
HP 8648B Signal Generator W/ Option: 1EA
HP 8648C Signal Generator 9kHz-3200MHz opt 1EA rack17c
HP 8648C SIGNAL GENERATOR OPT. 1EA
HP 8648C Signal Generator W/ Options 1E5/1E6/1EA
HP 8657D signal generator, 0.1 to 1030 MHz, guaranteed
HP 8662A SIGNAL GENERATOR WITH HP 11729C Test Set
HP 8663A Synthesized Signal Generator, Opt 003
HP 8664A 3 GHz High-Performance Signal Generator (2013 SALE )
HP 8664A Opt 001, 008 Signal Generator 100kHz-3GHz Calibrated with  
HP 8664A/001/004/008/010 Signal Generator - 100 kHz to 3 GHz, Price Reduced 
HP 8665B /001/004 100kHz-6GHz Synthesized Signal Generator