لا الفني فعل الاشتراك ولا الدعم الفني اختبر الكابل.

Because Arabic often expresses neither ... nor ... with لا ... ولا ....

So the pattern is:

• لا + first clause/item
• ولا + second clause/item

In this sentence, the two halves are being linked as a negative pair, just like English neither X nor Y.

That is a very good question.

In a simple sentence, past-tense negation is usually done differently:

• in more standard Arabic: ما
• in Egyptian colloquial: usually ما...ش

But لا ... ولا ... is a special pairing meaning neither ... nor ..., and it can introduce whole clauses, even if the verbs are past.

So this use does not feel like the ordinary لا of simple verb negation. It is part of a fixed correlative structure.

In very everyday Egyptian, though, many speakers would still prefer a more colloquial version such as:

• الفني ما فعّلش الاشتراك، والدعم الفني ما اختبرش الكابل

It is understandable, but it sounds somewhat formal or mixed, not fully everyday conversational Egyptian.

Why?

• اختبر is a bit formal/technical.
• The overall structure feels closer to careful written Arabic or formal speech.
• Everyday Egyptian often prefers ما...ش negation.

A more colloquial Egyptian version might be:

• الفني ما فعّلش الاشتراك، والدعم الفني ما جرّبش الكابل

or, keeping the neither ... nor ... feel:

• لا الفني فعّل الاشتراك ولا الدعم الفني جرّب الكابل

So the original is not wrong, but it is not the most casual spoken Egyptian.

Arabic allows more than one common word order.

Two important ones are:

• verb + subject + object
• subject + verb + object

Here, the sentence uses subject-first order:

• الفني فعل ...
• الدعم الفني اختبر ...

That makes sense because the sentence is contrasting the two subjects:

• not the technician
• nor technical support

So putting the subjects right after لا and ولا helps highlight that contrast.

فني is basically technical as an adjective, but with ال it can function like a noun:

• الفني = the technician / the tech

This is very common in Arabic: an adjective can become a noun when the context is clear.

Similarly:

• الدعم الفني = technical support

So:

• الفني = one technician / the tech person
• الدعم الفني = the support department or support team

Probably not in the plain English sense of did.

As written without diacritics, فعل is ambiguous. In this context, many learners would expect it to be understood as فعّل with a doubled middle consonant, meaning something like:

• activate
• enable
• set up

So فعّل الاشتراك would mean something like activated the subscription/service.

Why the confusion?

Because Arabic writing usually leaves out short vowels, and often also leaves out the shadda in everyday writing. So فعل on the page may stand for more than one pronunciation.

If you read it as plain فَعَلَ = did, the phrase sounds much less natural with الاشتراك.

So for a learner, it is safest to understand this as an omitted-shadda form of فعّل.

It is basically:

• و = and
• لا = not

Together, ولا means something like:

• and not
• nor
• sometimes not even, depending on context

In modern spelling it is normally written together as ولا.

In this sentence, it is the second half of the لا ... ولا ... pattern.

Arabic does not use an extra auxiliary verb like English do / did in this kind of sentence.

In English, you may say:

• did not test

But in Arabic, the main verb itself already carries the past meaning:

• اختبر = tested
• not did test as a separate two-word structure

So Arabic usually builds negation with particles, not with a helper verb like did.

That is why you do not see any separate word corresponding to English did.

A rough Egyptian-style pronunciation would be:

• la el-fanni faʕʕal el-eshterāk, wala ed-daʕm el-fanni ekhtabar el-kābel

A few notes:

• الفني is usually pronounced el-fanni
• الدعم begins with a sun letter, so ال assimilates:
  الدعم sounds like ed-daʕm, not el-daʕm
• اختبر in Egyptian speech may sound like ekhtabar
• الكابل is often pronounced close to el-kābel

Since the sentence itself is somewhat formal/mixed, exact pronunciation can vary a bit depending on how colloquial or how standard the speaker is being.

Yes, and that would often sound more naturally Egyptian in everyday speech.

For example:

• الفني ما فعّلش الاشتراك، والدعم الفني ما اختبرش الكابل

And with a more everyday verb for test:

• الفني ما فعّلش الاشتراك، والدعم الفني ما جرّبش الكابل

So if your goal is natural spoken Egyptian, using ما...ش is usually the safer choice.

The original sentence is useful for understanding the لا ... ولا ... pattern, but it is not the most colloquial way to say it.