hosyousyo wo motte ittara, muryou de mite moraeta.

保証書（ほしょうしょ） means a warranty certificate, guarantee card, or warranty document.

It is the paper that proves a product is still under warranty, so you can get repairs or service under certain conditions.

を marks the direct object of 持って行ったら.

So here, 保証書を持って行ったら means if/when I took the warranty document.

Important point:
the thing marked by を is what was taken, not necessarily what was looked at. In real-life context, the person may have taken the warranty card and then had the product inspected, with the product left unstated because it is obvious from context.

It breaks down like this:

• 持つ = to hold
• 持って行く = to take something with you / bring something to a place
• 持って行った = took/brought
• 持って行ったら = if/when after taking it / when I took it

So ～たら is attached to the past form and makes a conditional or time-setting expression.

In this sentence, it is very natural to read it as:

• when I took it
• after I brought it
• if I brought it

Depending on context, English may prefer when rather than if.

It can feel like any of those, depending on context.

In this sentence, ～たら is probably not a purely hypothetical if. It sounds more like a real sequence of events:

• When/after I brought the warranty card, I was able to get it looked at for free.

So here ～たら sets up the condition/result or event/result relationship:

• first: bring the warranty card
• then: they look at it for free

This is a very common use of ～たら in everyday Japanese.

The difference is about direction from the speaker’s point of view.

• 持って行く = take it there / bring it to that place
• 持って来る = bring it here / bring it toward the speaker or current location

So 持って行ったら suggests the speaker went somewhere else with the warranty card, such as a store or repair shop.

In English, we often use bring more loosely, so the translation may still say brought, even when Japanese uses 行く.

無料で means for free or free of charge.

Here で marks the manner or condition under which something is done. So:

• 無料で見てもらえた = I was able to have it looked at for free

This use of で is very common with cost-related expressions:

• タダで = for free
• 100円で = for 100 yen
• 現金で = in cash

So 無料で is a very natural set phrase.

This is one of the most important parts of the sentence.

It breaks down like this:

• 見る = to see / look at / check / examine
• 見てもらう = to have someone look at it for you; to receive the favor of someone looking at it
• 見てもらえた = was able to have someone look at it for me

So this is not just they looked at it. It includes the idea that the speaker received that action as a benefit.

A natural explanation is:

• I managed to get them to look at it for me
• I was able to have it checked for free

The もらう part adds a benefit/favor nuance.

Good question. The difference is subtle but important:

• 見てもらった = I had them look at it / they looked at it for me
• 見てもらえた = I was able to have them look at it / I managed to get them to look at it

The える part adds an ability/success nuance.

So 見てもらえた can suggest something like:

• it was possible
• they agreed
• I successfully got that service

This fits well with the idea that bringing the warranty card made the free inspection possible.

Yes.

Although 見る often means to see, it also very commonly means:

• look at
• check
• inspect
• examine
• take a look at

In a service or repair context, 見てもらう often means:

• have someone check the item
• have someone inspect the problem
• have someone take a look at it

So in this sentence, 見る is almost certainly being used in that broader sense.

Japanese leaves a lot unstated when it is obvious from context.

In 無料で見てもらえた, the most natural implied roles are:

• I = the person receiving the benefit
• they/the staff/the repair shop = the people doing the checking
• it/the item/the product = the thing being checked

So a fuller English-style version might be:

• When I brought the warranty card, I was able to get the staff to inspect it for free.

But Japanese does not need to spell all of that out.

Not necessarily.

Grammatically, the explicitly mentioned object is only the thing being taken:

• 保証書を持って行ったら = when I took the warranty card

In the next part, the thing being looked at is omitted.

Depending on context, that could be:

• the product
• the damage/problem
• the item you brought in
• possibly the warranty card itself, though that is less likely in real-life context

So Japanese leaves it implicit because the listener can usually infer it.

It is in plain form, so it sounds casual or neutral, not formal-polite.

• 保証書を持って行ったら、無料で見てもらえた。

A more polite version would be:

• 保証書を持って行ったら、無料で見てもらえました。

So the original sentence is the kind of thing you might say in casual conversation when telling someone what happened.

The sentence does more than state a fact. It suggests a helpful result:

• bringing the warranty card made it possible
• the speaker benefited from that
• the inspection/check was free

So the nuance is something like:

• Because I brought the warranty card, they were able to check it for free for me.
• When I brought the warranty card, I managed to get it looked at for free.

The combination of ～たら and ～てもらえた gives the sentence a very natural cause/result + received benefit feeling.