Diagnostic Indicator My Optiplex 330 express symptoms that resemble a pre-POST failure. Which of these diagnostic indicators would confirm or disprove a pre-POST failure? Beep codes, error messages, power LED status, and diagnostic LED status Thanks

Page 36 owners manual.

35
Operation
Diagnostic Chart
Your garage door opener is programmed with
self-diagnostic capabilities. The "Learn"
button/diagnostic LED will flash a number of times
then pause signifying it has found a potential issue.
Consult Diagnostic Chart below.
Installed
Safety Reversing
Sensor
"Learn"
Button
Safety Reversing
Sensor
Bell Wire
Diagnostics Located
on Motor Unit
LED or
Diagnostic
LED
1 Flash
Safetyreversing
sensorswire open
(broken or
disconnected).
OR
2 Flashes
Safetyreversing
sensorswire shorted
or black/white wire
reversed.
Symptom:
One orbothof the Indicatorlights onthe safety
reversingsensors donot glow steady.
l
Inspectsensor wiresfor a short(staple in wire),correctwiring
polarity(black/white wiresreversed),broken or disconnected
wires,replace/attach asneeded.
l
Disconnectall wiresfrombackofmotor unit.
l
Remove sensorsfrombracketsand shorten sensor wiresto
1-2 ft.(30-60 cm) frombackeach ofsensor.
l
Reattach sending eye to motor unitusing shortened wires.If
sending eye indicator lightglowssteadily,attach the receiving
eye.
l
Align sensors,ifthe indicator lightsglowreplace the wiresfor
the sensors.Ifthe sensor indicator lightsdo notlight,replace
the safetyreversing sensors.
3 Flashes
Door control or wire
shorted.
Symptom:
LEDis not lit ondoorcontrol.
l
Inspectdoor control/wiresfor a short(staple in wire),replace
asneeded.
l
Disconnectwiresatdoor control,touch wirestogether.If
motor unitactivates,replace door control.
l
Ifmotor unitdoesnotactivate,disconnectdoor control wires
frommotor unit.Momentarilyshortacrossred and white
terminalswith jumper wire.Ifmotor unitactivates,replace
door control wires.
4 Flashes
Safetyreversing
sensorsslightly
misaligned (dimor
flashing LED).
Symptom:
Sendingindicatorlight glows steadily,receiving
indicatorlight is dim orflashing.
l
Realign receiving eye sensor,clean lensand secure
brackets.
l
Verifydoor trackisfirmlysecured to wall and doesnotmove.
5 Flashes
Motor overheated or
possible RPMsensor
failure.Unplug to
reset.
Symptom:
Motorhas overheated; the motorunit does not
operate ortrolley is stuck onstopbolt =Motorunit hums briefly;
RPMSensor=Short travel6-8"(15-20 cm).
l
Unplug unitto reset.Tryto operate motor unit,check
diagnosticcode.
l
Ifitisstill flashing 5 timesand motor unitmoves6-8"(15-20
cm),replace RPMsensor.
l
Ifmotor unitdoesn'toperate,motor unitisoverheated.Wait
30 minutesand retry.Ifmotor unitstill will notoperate replace
logicboard.
6 Flashes
Motor CircuitFailure.
Replace Receiver
LogicBoard.
Symptom:
Motorunit doesn't operate.
l
Replace logicboard because motor rarelyfails. https://www.chamberlain.com/CatalogResourcesV3/en-us/shared/files/tucmanuals/114A4252.pdf

/D OFF Indicator The instrument cluster receives the O/D OFF indicator status from the PCM over the communication network. When the overdrive function is turned off, the PCM sends a command to the instrument cluster to turn on the O/D OFF indicator. When a powertrain concern exists, the O/D OFF indicator flashes amber and illuminates green when overdrive is selected off. What code ? you said solenoid A -
P0750 SSA SSA Solenoid Circuit Failure SSA circuit failed to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. No reverse gear (short) or no 4th gear (open). MIL on. Go To Pinpoint Test A . P0751 SSA SSA Functional Failure (Stuck Off) Mechanical or hydraulic failure of the shift solenoid. Not all gears present, MIL on. Refer to Diagnosis By Symptom . P0752 SSA SSA Functional Failure (Stuck On) Mechanical or hydraulic failure of the shift solenoid. Not all gears present, MIL on. Refer to Diagnosis By Symptom . P0753 SSA SSA Solenoid Circuit Failure SSA circuit failed to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. No reverse gear (short) or no 4th gear (open). MIL off. Go To Pinpoint Test A . Could be a wiring problem . Did you check the solenoid A wiring circuit back to the PCM ?

PRE-DIAGNOSTIC INSPECTIONBefore diagnosing ABS/TCS, perform a comprehensive visual inspection of system as follows.Check ABS/TCS wiring harness connectors for looseness. Check harness routing; pay particular attention to wheel speed sensor wiring harness routing. Check fuses No. 1D, 5B and 6B in instrument panel fuse block. Check fuses No. 1 and 2 in underhood fuse block. Check brake fluid level in master cylinder reservoir. Check brake fluid level in Pressure Modulator Valve (PMV) assembly reservoir. Ensure parking brake is fully released. Ensure parking brake switch is functioning properly. Always perform ABS/TCS system functional check before using DIAGNOSTIC CODE CHARTSThe EBCM/EBTCM has self-diagnostic capability, which can detect system failures. Fault codes stored by EBCM/EBTCM can be displayed using Tech 1 scan tester. There are no provisions for flash code diagnostics.Begin ABS/TCS diagnosis with PRE-DIAGNOSTIC INSPECTION procedure. If failures are found during pre-diagnostic inspection, perform necessary repairs, and proceed with ABS/TCS FUNCTIONAL CHECK. See Fig. 5 .If no failures are found during pre-diagnostic inspection, go to ABS/TCS FUNCTIONAL CHECK. See Fig. 5 . The ABS/TCS FUNCTIONAL CHECK will either indicate ABS/TCS is functioning properly or direct technician to various diagnostic procedures such as diagnostic charts, symptom diagnosis or BRAKE warning light diagnosis.CHART D - TRACTION OFF WARNING LIGHT ON CONTINUOUSLY & NO DTC SET (BUICK WITH UH8 OR U2A INSTRUMENT CLUSTER)Circuit DescriptionWhen ignition switch is first turned to RUN position, EBTCM goes through a self-test, which lasts 2-4 seconds. During self-test, EBTCM commands TRACTION OFF indicator warning light on. Powertrain Control Module (PCM) can also command EBTCM to set a Code 75 which will illuminate TRACTION OFF indicator.Traction control switch is located either on instrument panel center trim plate or driver's front door trim panel. Switch allows driver to select traction control mode (on/off). When traction control system is turned off, TRACTION OFF warning light comes on.EBTCM monitors transaxle temperature through

1. The failure lamp general descriptions
Fault indicator light on the dashboard; General color is red (refer to the vehicle manual) on electricity self-inspection, failure indicator Chang Liang out after 2 seconds; Efi system failure after the light; General failure, failure indicator light Chang Liang; Serious failure, failure indicator light flashing; Failure disappears, failure indicator light put out automatically.auto diagnostic tool

Change your motherboard, this one had a failure in one of the power stages for the processor - it's dead.

If you are getting no video at all, then we can use the diagnostic LEDs and the power LED to help determine the failure.
http://www.fixya.com/support/r4282412-find_no_post_diagnostic_information_dell
Solid Orange/Amber generally is a Motherboard failure. Remove all expansion cards and all external connections, see if anything changes. If not, replace motherboard. If you get a change, then add items back one at a time till you ID the Fault

The exact meaning of the beeps for Dell depends on their... rhythm.

http://www.nullamatix.com/dell-diagnostic-beep-code-troublshooting-chart/

Six beeps might indicate a simple CMOS failure caused by a bad battery, which is easy to replace.