Lenovo ThinkCentre M90q Owner's manual

M90q Hardware Maintenance Manual

First Edition (June 2020)
© Copyright Lenovo 2020.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data r s ftware is delivered pursuant t a General Services
Administrati n “GSA” c ntract, use, repr ducti n, r discl sure is subject t restricti ns set f rth in C ntract N . GS-
35F-05925.

Contents
About this manual . . . . . . . . . . . . iii
Chapter . Important safety
information. . . . . . . . . . . . . . . .
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 2
Safety inspecti n guide . . . . . . . . . . . . . 3
Handling electr static discharge-sensitive
devices . . . . . . . . . . . . . . . . . . . 4
Gr unding requirements . . . . . . . . . . . . 4
Safety n tices (multi-lingual translati ns) . . . . . . 4
Chapter 2. Important service
information. . . . . . . . . . . . . . . 27
Strategy f r replacing FRUs . . . . . . . . . . 27
Strategy f r replacing a hard disk drive r a
s lid-state drive . . . . . . . . . . . . . 27
Imp rtant n tice f r replacing a system
b ard . . . . . . . . . . . . . . . . . 27
H w t use err r c des . . . . . . . . . . 27
Strategy f r replacing FRUs f r CTO, special-bid,
and standard m dels. . . . . . . . . . . . . 28
Pr duct definiti n . . . . . . . . . . . . 28
FRU identificati n . . . . . . . . . . . . 28
Chapter 3. Product overview . . . . . 29
Fr nt . . . . . . . . . . . . . . . . . . . 29
Rear . . . . . . . . . . . . . . . . . . . 30
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 3
Service check ut . . . . . . . . . . . . . . 31
Pr blem determinati n tips . . . . . . . . 31
Sympt m-t -FRU index . . . . . . . . . . . 32
Hard disk drive b t err r . . . . . . . . . 32
P wer supply pr blems . . . . . . . . . . 33
Beep sympt ms. . . . . . . . . . . . . 33
POST err r c des . . . . . . . . . . . . 34
Miscellane us err r c nditi ns . . . . . . . 35
Undetermined pr blems . . . . . . . . . 37
Chapter 5. Troubleshooting,
diagnostics, and recovery . . . . . . . 39
Basic pr cedure f r res lving c mputer
pr blems . . . . . . . . . . . . . . . . . 39
Tr ublesh ting . . . . . . . . . . . . . . 39
Startup pr blems . . . . . . . . . . . . 40
Audi pr blems . . . . . . . . . . . . . 41
Netw rk pr blems . . . . . . . . . . . . 41
Perf rmance pr blems . . . . . . . . . . 44
St rage drive pr blems . . . . . . . . . . 45
CD r DVD pr blems . . . . . . . . . . . 45
Serial c nnect r pr blems . . . . . . . . . 46
USB device pr blems . . . . . . . . . . 46
S ftware pr blems. . . . . . . . . . . . 47
Diagn stics . . . . . . . . . . . . . . . . 47
Len v diagn stic t ls . . . . . . . . . . 47
UEFI diagn stic pr gram . . . . . . . . . 47
Rec very . . . . . . . . . . . . . . . . . 48
Rest re system files and settings t an earlier
p int . . . . . . . . . . . . . . . . . 48
Rest re y ur files fr m a backup . . . . . . 48
Reset y ur c mputer . . . . . . . . . . . 48
Use advanced pti ns . . . . . . . . . . 48
Wind ws aut matic rec very. . . . . . . . 49
Create and use a rec very USB device . . . . 49
Update the device driver . . . . . . . . . 49
Chapter 6. Hardware removal and
installation . . . . . . . . . . . . . . . 5
Handling static-sensitive devices . . . . . . . . 51
Service t l kit . . . . . . . . . . . . . . . 51
Maj r FRUs and CRUs . . . . . . . . . . . . 52
System b ard . . . . . . . . . . . . . . . 55
Rem ving and installing hardware . . . . . . . 56
External pti ns . . . . . . . . . . . . . 56
P wer adapter and p wer c rd . . . . . . . 56
Vertical stand . . . . . . . . . . . . . . 58
VESA m unt bracket . . . . . . . . . . . 60
External ptical drive b x and external ptical
drive . . . . . . . . . . . . . . . . . 60
P wer adapter bracket . . . . . . . . . . 62
Dust shield . . . . . . . . . . . . . . . 65
Rear Wi-Fi antenna. . . . . . . . . . . . 66
C mputer c ver . . . . . . . . . . . . . 67
Hard disk drive and hard disk drive bracket . . 69
Internal speaker . . . . . . . . . . . . . 71
System fan . . . . . . . . . . . . . . . 72
C in-cell battery. . . . . . . . . . . . . 73
Wi-Fi card and Wi-Fi card shield . . . . . . 75
B tt m c ver . . . . . . . . . . . . . . 77
Mem ry m dule . . . . . . . . . . . . . 78
M.2 s lid-state drive . . . . . . . . . . . 80
Rear Wi-Fi antenna cable . . . . . . . . . 81
Fr nt Wi-Fi antenna . . . . . . . . . . . 82
Antenna bracket. . . . . . . . . . . . . 83
© C pyright Len v 2020 i

Heat sink . . . . . . . . . . . . . . . 84
Micr pr cess r . . . . . . . . . . . . . 85
System b ard . . . . . . . . . . . . . . 86
Chapter 7. Notices and
trademarks. . . . . . . . . . . . . . . 89
ii M90q Hardware Maintenance Manual

About this manual
This manual pr vides service and reference inf rmati n f r ThinkCentre® c mputers listed n the fr nt c ver.
Illustrati ns in this manual might l k different fr m y ur pr duct.
Use this manual al ng with the advanced diagn stic tests t tr ublesh t pr blems.
Important: This manual is intended nly f r trained service technicians wh are familiar with ThinkCentre
c mputers. Use this manual al ng with the advanced diagn stic tests t tr ublesh t pr blems effectively.
Bef re servicing a ThinkCentre c mputer, be sure t read and understand Chapter 1 “Imp rtant safety
inf rmati n” n page 1.
© C pyright Len v 2020 iii

iv M90q Hardware Maintenance Manual

Chapter . Important safety information
General safety
F ll w these rules t ensure general safety:
• Observe g d h usekeeping in the area f the machines during and after maintenance.
• When lifting any heavy bject:
1. Ensure y u can stand safely with ut slipping.
2. Distribute the weight f the bject equally between y ur feet.
3. Use a sl w lifting f rce. Never m ve suddenly r twist when y u attempt t lift.
4. Lift by standing r by pushing up with y ur leg muscles; this acti n rem ves the strain fr m the
muscles in y ur back.
Attention: D n t attempt t lift any bjects that weigh m re than 16 kg (35 lb) r bjects that y u
think are t heavy f r y u.
• D n t perf rm any acti n that causes hazards t the cust mer, r that makes the equipment unsafe.
• Bef re y u start the machine, ensure that ther service representatives and the cust mer's pers nnel are
n t in a hazard us p siti n.
• Place rem ved c vers and ther parts in a safe place, away fr m all pers nnel, while y u are servicing the
machine.
• Keep y ur t l case away fr m walk areas s that ther pe ple will n t trip ver it.
• D n t wear l se cl thing that can be trapped in the m ving parts f a machine. Ensure that y ur sleeves
are fastened r r lled up ab ve y ur elb ws. If y ur hair is l ng, fasten it.
• Insert the ends f y ur necktie r scarf inside cl thing r fasten it with a n nc nductive clip, appr ximately
8 centimeters (3 inches) fr m the end.
• D n t wear jewelry, chains, metal-frame eyeglasses, r metal fasteners f r y ur cl thing.
Remember: Metal bjects are g d electrical c nduct rs.
• Wear safety glasses when y u are: hammering, drilling, s ldering, cutting wire, attaching springs, using
s lvents, r w rking in any ther c nditi ns that might be hazard us t y ur eyes.
• After service, reinstall all safety shields, guards, labels, and gr und wires. Replace any safety device that
is w rn r defective.
• Reinstall all c vers c rrectly bef re returning the machine t the cust mer.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury,
seek medical care immediately.
CAUTION:
Avoid contact with hot components inside the computer. During operation, some components
become hot enough to burn the skin. Before you open the computer cover, turn off the computer,
disconnect power, and wait approximately 0 minutes for the components to cool.
© C pyright Len v 2020

Electrical safety
CAUTION:
Electrical current from power, telephone, and communication cables can be hazardous. To avoid
personal injury or equipment damage, disconnect the attached power cords, telecommunication
systems, networks, and modems before you open the computer covers, unless instructed otherwise
in the installation and configuration procedures.
Observe the f ll wing rules when w rking n electrical equipment.
Important: Use nly appr ved t ls and test equipment. S me hand t ls have handles c vered with a s ft
material that d es n t insulate y u when w rking with live electrical currents. Many cust mers have, near
their equipment, rubber fl r mats that c ntain small c nductive fibers t decrease electr static discharges.
D n t use this type f mat t pr tect y urself fr m electrical sh ck.
• Find the r m emergency p wer- ff (EPO) switch, disc nnecting switch, r electrical utlet. If an electrical
accident ccurs, y u can then perate the switch r unplug the p wer c rd quickly.
• D n t w rk al ne under hazard us c nditi ns r near equipment that has hazard us v ltages.
• Disc nnect all p wer bef re:
– Perf rming a mechanical inspecti n
– W rking near p wer supplies
– Rem ving r installing Field Replaceable Units (FRUs)
• Bef re y u start t w rk n the machine, unplug the p wer c rd. If y u cann t unplug it, ask the cust mer
t p wer- ff the wall b x that supplies p wer t the machine and t l ck the wall b x in the ff p siti n.
• If y u need t w rk n a machine that has exp sed electrical circuits, bserve the f ll wing precauti ns:
– Ensure that an ther pers n, familiar with the p wer- ff c ntr ls, is near y u.
Remember: An ther pers n must be there t switch ff the p wer, if necessary.
– Use nly ne hand when w rking with p wered- n electrical equipment; keep the ther hand in y ur
p cket r behind y ur back.
Remember: There must be a c mplete circuit t cause electrical sh ck. By bserving the ab ve rule,
y u may prevent a current fr m passing thr ugh y ur b dy.
– When using a tester, set the c ntr ls c rrectly and use the appr ved pr be leads and access ries f r
that tester.
– Stand n suitable rubber mats ( btained l cally, if necessary) t insulate y u fr m gr unds such as
metal fl r strips and machine frames.
Observe the special safety precauti ns when y u w rk with very high v ltages; these instructi ns are in
the safety secti ns f maintenance inf rmati n. Use extreme care when measuring high v ltages.
• Regularly inspect and maintain y ur electrical hand t ls f r safe perati nal c nditi n.
• D n t use w rn r br ken t ls and testers.
• Never assume that p wer has been disc nnected fr m a circuit. First, check that it has been p wered- ff.
• Always l k carefully f r p ssible hazards in y ur w rk area. Examples f these hazards are m ist fl rs,
n ngr unded p wer extensi n cables, p wer surges, and missing safety gr unds.
• D n t t uch live electrical circuits with the reflective surface f a plastic dental mirr r. The surface is
c nductive; such t uching can cause pers nal injury and machine damage.
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• D n t service the f ll wing parts with the p wer n when they are rem ved fr m their n rmal perating
places in a machine:
– P wer supply units
– Pumps
– Bl wers and fans
– M t r generat rs
and similar units. (This practice ensures c rrect gr unding f the units.)
• If an electrical accident ccurs:
– Use cauti n; d n t bec me a victim y urself.
– Switch ff p wer.
– Send an ther pers n t get medical aid.
Safety inspection guide
The intent f this inspecti n guide is t assist y u in identifying p tentially unsafe c nditi ns n these
pr ducts. Each machine, as it was designed and built, had required safety items installed t pr tect users
and service pers nnel fr m injury. This guide addresses nly th se items. H wever, g d judgment sh uld
be used t identify p tential safety hazards due t attachment f features r pti ns n t c vered by this
inspecti n guide.
If any unsafe c nditi ns are present, y u must determine h w seri us the apparent hazard c uld be and
whether y u can c ntinue with ut first c rrecting the pr blem.
C nsider these c nditi ns and the safety hazards they present:
• Electrical hazards, especially primary p wer (primary v ltage n the frame can cause seri us r fatal
electrical sh ck).
• Expl sive hazards, such as a damaged CRT face r bulging capacit r
• Mechanical hazards, such as l se r missing hardware
The guide c nsists f a series f steps presented in a checklist. Begin the checks with the p wer ff, and the
p wer c rd disc nnected.
Checklist:
1. Check exteri r c vers f r damage (l se, br ken, r sharp edges).
2. P wer- ff the c mputer. Disc nnect the p wer c rd.
3. Check the p wer c rd f r:
a. A third-wire gr und c nnect r in g d c nditi n. Use a meter t measure third-wire gr und
c ntinuity f r 0.1 hm r less between the external gr und pin and frame gr und.
b. The p wer c rd sh uld be the appr priate type as specified in the parts listings.
c. Insulati n must n t be frayed r w rn.
4. Rem ve the c ver.
5. Check f r any bvi us alterati ns. Use g d judgment as t the safety f any alterati ns.
6. Check inside the unit f r any bvi us unsafe c nditi ns, such as metal filings, c ntaminati n, water r
ther liquids, r signs f fire r sm ke damage.
7. Check f r w rn, frayed, r pinched cables.
Chapter 1.Imp rtant safety inf rmati n 3

8. Check that the p wer-supply c ver fasteners (screws r rivets) have n t been rem ved r tampered
with.
Handling electrostatic discharge-sensitive devices
Any c mputer part c ntaining transist rs r integrated circuits (ICs) sh uld be c nsidered sensitive t
electr static discharge (ESD). ESD damage can ccur when there is a difference in charge between bjects.
Pr tect against ESD damage by equalizing the charge s that the machine, the part, the w rk mat, and the
pers n handling the part are all at the same charge.
Notes:
1. Use pr duct-specific ESD pr cedures when they exceed the requirements n ted here.
2. Make sure that the ESD pr tective devices y u use have been certified (ISO 9000) as fully effective.
When handling ESD-sensitive parts:
• Keep the parts in pr tective packages until they are inserted int the pr duct.
• Av id c ntact with ther pe ple while handling the part.
• Wear a gr unded wrist strap against y ur skin t eliminate static n y ur b dy.
• Prevent the part fr m t uching y ur cl thing. M st cl thing is insulative and retains a charge even when
y u are wearing a wrist strap.
• Use the black side f a gr unded w rk mat t pr vide a static-free w rk surface. The mat is especially
useful when handling ESD-sensitive devices.
• Select a gr unding system, such as th se listed bel w, t pr vide pr tecti n that meets the specific
service requirement.
Note: The use f a gr unding system is desirable but n t required t pr tect against ESD damage.
– Attach the ESD gr und clip t any frame gr und, gr und braid, r green-wire gr und.
– Use an ESD c mm n gr und r reference p int when w rking n a d uble-insulated r battery-
perated system. Y u can use c ax r c nnect r- utside shells n these systems.
– Use the r und gr und-pr ng f the ac plug n ac- perated c mputers.
Grounding requirements
Electrical gr unding f the c mputer is required f r perat r safety and c rrect system functi n. Pr per
gr unding f the electrical utlet can be verified by a certified electrician.
Safety notices (multi-lingual translations)
The cauti n and danger safety n tices in this secti n are pr vided in the f ll wing languages:
• English
• Arabic
• Brazilian/P rtuguese
• Chinese (simplified)
• Chinese (traditi nal)
• French
• German
• Hebrew
4M90q Hardware Maintenance Manual